Question

87 is 15% of what number​

Answer 1

580

Explanation:

Alright. Translate that into math, and you get:

87=15/100x

multiply both sides by x

8700/15=x

x=8700/15

x=580

Check:

580*15/100

58*15/10

870/10

87

BINGO!

Answer 2

580

Explanation:

Let's translate this word for word.

87 is 15% of what number

87 = 15% times x

87=.15 times x

`87=.15 \cdot x`

Divide both sides by .15

`(87)/(.15)=(.15x)/(.15)`

Cancel out the common factor of .15 on the right; that is .15/.15=1.

`580=x`

580 is the number