Algebra PERCENT WORD PROBLEM – Let’s solve it step-by-step….

TabletClass Math:


Math Notes:

[autrycourt]

8 minutes into this video and he still hasn't addressed the problem posed here. give me strength!

[braznartn]

All your explaining made it much more complicated than it was!

[robgelfand]

Just a few steps here.
First get the price of the shirt before sales tax 8.82/1.05 = 8.40
Next 8.40 is 80% of the original price so divide 8.40 by 8 to get 10%($1.05) and times the result by 10 to get the original price = 10.50

[lennartbjorksten]

First step: set your variable to be whatever the problem is asking for. That should be the first step in any word problem.
This problem asks you to find the original price of the shirt.
Hence, x = the original price of the shirt.

Second step: Construct your equation.
Since there's a 20% discount, the sale price is 80% of x, or 0.8 * x
The sale price plus sales tax is (0.8 * x) * 1.05. This equals the price Sara paid: $8.82
So your equation is (0.8 * x) * 1.05 = $8.82.

Third step: get the left side of the equation to be just x.
Divide both sides by 1.05, and you get 0.8x = $8.82/1.05 = $8.40
Divide both sides by 0.8, and you get $8.40/0.8 = $10.50

Double checking:
If the original price is $10.50, then the sales price is $10.50 * 0.8 = $8.40
Add sales tax: $8.40 * 1.05 = $8.82. That's the price Sara paid, so the answer checks out.

BONUS TIP: If division by a decimal freaks you out, you can convert it to a fraction.
Dividing by 0.8 is the same as dividing by (8/10). That's the same as multiplying by (10/8).
Many people find $8.40 * (10/8) easier to handle than $8.40 / 0.8, even though they're the same thing. 🙂

[bradlewis]

His explanation was for any IQ of a person who may be desiring to know how to figure it out. I suffered a T.B.I. about 14 years ago. And even though I was sure about some steps, I still desire to see everything explained to congratulate myself on things I still know and I desire the full explanation on anything that I may not have known. So I say job well done John, ?, thanks for the confirmation on the stuff I was convinced that I had right.

[georgesadler]

MR. TabletClass Math, thank you for an awesome video/lecture on Algebra Percent Word Problem. Students must do many word problems, for a full understanding of the subject.

[Kate]

Love all your advice and tips. Great teacher.

[MrMousley]

Two easy steps here ..
1) The $8.82 she paid includes 5% sales tax 8.82 = 105%
100 x 8.82 / 105 = 8.40 The sale price of the shirt was $8.40
2) The shirt was 20% off in a sale .. so $8.40 is 80% of the original price
8.40 x 100 / 80 = 10.50 The original price of the shirt was $10.50

[CecilLagarde]

Watching from Philippines. I don't like math but I have to learn it for me to pass the exam. Please more videos for those lower thinking or low learner like me. I have poor understanding about math problem. I want explanation lower than basic or short cut explanation that easy to remember . Thanks for sharing this video.

[GoofballFlyer]

$8.82/1.05=$8.40 = price with no tax. $8.40/.8=$10.50 = price before discount and sales tax.

[LeonGarcia]

I use rule of three for this .. if 8.82 its the 105% how much would be 100% so 100*8.82 then divide by 105 thats 8.4 without tax or whats the same but without percents 8.82*1 divided by 1.05 = 8.4. then I use rhe same rule to get the 100% from the 80% that I paid, so if 8.4 is the 80% how much was 100%, 8.4*100 then divide that with 80 and you get the price wiithout discount 10.5

[robertakerman]

I saw Sarah @ Good Wheel Bargains. That's Y it was inexpensive. Great explanation-could have been boiled down a bit.

[ldglobaltv]

Could you cut the waffle and get to the point.

[zacharylong]

I wasn't going to leave a comment, but now I can't help myself. I laughed when I saw how many people were also feeling the same way. This video needs to be simplified or removed.
If I were a kid in grade school and had hours worth of homework to get done, I'd be pissed that I spent nearly 30 mins trying to figure out what the heck your talking about.
I'm catching up on math so I can pass an exam for an apprenticeship program and this was way too much for me, I can't imagine how the kids feel. If anything this was more confusing than helpful.
Thank you anyway for your time and effort. I give this video a D- .

[divyap]

11 minutes in, and he just got to the equation.

[moniruzzaman]

i can understand you more than my teacher
🧠

[braznartn]

x + 5%x =8.82
x = discount price before tax
Now plug x into this formula:
x = y - 20%y
y = original price before tax ($10.50)

[michaelempeigne]

I like to assume that it cost 100 dollars :

100 ----> 20 80 ( after 20% off ) 4 84 ( after adding 5% )


so now we can use proportion : x = 8.82 * 100 / 84
x = 882 / 84
x = 10.50

[TheRealTacGaming]

Awesome video can you make a calculus video i learned allot from you functions, algebra and Calculus etc...

[GodzRemains]

How do we retain the skills we learn associated with math if we aren't using them regularly? After I learn something in math, I always forget how to do it later in life if I am not regularly using it.