Question

25% of what is $21

Answer 1

21$ - 0.25. 1 = ?
21*4 =84

Answer 2

Convert to decimal........ .25
.25 x = $21
x=$21/.25= $84

Answer 3

this can be represented by an equation: \[0.25*x=21\] in which you solve for the variable X to find how much money was originally there.

Answer 4

You can also use the following reasoning:
\[\frac{25}{100}=\frac{21}{x}\] Cross-multiplicating:
0.25*x=21
x=84
To see what it means, notice that 25/100 = 1/4. In other words:
(1/4)*x=21
Or: "One fourth of some number x equals 21". So, if we take this number and take one fourth of it, we will obtain 21. It means that, multiplying 21 by 4, we will obtain such number: 21*4 = 84.