Identifying percent amount and base | Decimals | Pre-Algebra | Khan Academy

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Identifying Percent Amount and Base

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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!

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I love his vids, I mean I really do but this one sent me for a loop for a second. If the formula is Base=Amount/Percent, then why not just follow through with that instead of inserting the 4? All problems can be solved by finding a common number but for first timers, following the formula is a great way to not confuse people. Imho. Thank you for your vids.

kaven
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Thank you so much! I learned all this in elementary, but I completely forgot how to do this. This was super helpful!

YokiDokiPanic
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I love these videos! They speak to my level of stupidity.

patricklora
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Couldn’t you also just divide 150 by 0.25?

mumkee