Introduction to ratios | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy

What a ratio is. Simple ratio problems.

Missed the previous lesson?

Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!

For free. For everyone. Forever. #YouCanLearnAnything

[mikeg]

For anyone having trouble with this...

I couldn't learn this when I was in middle and high school. I went onto college and found out I was capable of learning this stuff, just not in a standard classroom setting. I now have two degrees, one of which is a mechanical engineering degree. I found myself here because I wanted to brush up on some things for the military ASVAB test when I remembered how difficult this was when I was a kid. So please don't feel stupid if you're having difficulty learning this especially if its your first time. No one is above math.

[khanacademy]

Thanks. Don't know what happens in my brain sometimes!

[bulbysaur]

are we not going to talk about how neat he writes with a *mouse*
like actually, wow.

[bossalini]

What a great teacher. the examples are awesome. I'm 31 struggling with my math GED. I will definitely passed listening to this man. I've even found ways to simply to the problem without going through the full process

[haleweyahuissen]

Hey there but how did 5:10 changed into 1:5 shouldn't it be 1:2 ?

[Mike-eveb]

3:27 should’ve been 2 Horses. Correct ratio should be 1:2 or There is 1 dog for every 2 horses.

[Demon_vv]

Online school when there is COVID-19 be like:

[bushra]

Sal great explanation. Just one correction, at 3:59, ratio of dogs to horses is 1:2 not 1:5

[ambergrzybowski]

I don't get this stuff in class, but when I come home and watch it from these videos I get it instantly. Thank you !

[carmaela]

I haven't done ratios in 20 years. I was trying to help my daughter and the way her lesson explains ratios is impossible for me to understand and it wasn't jogging my memory. Your explanation was so, so easy to understand and helped us greatly. Thank you!

[sage]

I haven’t done any math assignments LMFAO I NEED TO HURRY UP

[felipenewcomb]

9:50 "Each group has three girls, each group has three girls. So, each group has three girls. Each group has three girls. SO how many girls are in each group? There are three girls." 😂

[aleks]

FINNALY A GOOD EXPLANATION MY TEACHER CANT TEACH SHIT

[antt]

But wouldn't the simplest form be 1:2 not 1:5?

[waleedd]

Ratio + you fell off + the hood watches brilliant now

[piner]

ratio + you fell off + didnt ask + dont care + spelling bee

[katherinekasparov]

AGH WHAT I have my math test tmr and its like 50% of my grade and this guy just made me understand ratio in 14 minutes - if the guy who made this vid is watching, you have taught me more in less than 15 mins then my math teacher has taught me in 2 years THANK YOUUU 🙏

[zeeshan]

AlHUMDULILAH SUBHANALLAH I UNDERSTOOD IT BY JUST WATCHING IT ONCE . SUBHANALLAH KHAN ACADEMY IS REALY VERY GOOD PLACE TO LEARN AND IT DOES NOT CONTAIN ANY PAID VIDEO SO ITS THE BEST LEARNING CHANNEL ON YOUTUBE

[Joomba_Juice]

These vids are really good
I watched this not knowing a clue what ratios are and now I am a beast at it

[lioudmilajoasil]

Lets smart smart person.... shows how to do math vids, helps more than 4 or 5 OH wait 3 million subs. This channel deserves 5 million subs