Question

21 is 35% of what number?
A. 21=0.35x;62.4 B. x=21x0.35;7.4 C. 0.35=21X;40x8 D. 21=0.35x;60

Answer 1

21*100/35
=60

Answer 2

Let that "some number" be x.
Then we can rewrite that sentence as,
21 = 0.35x
Dividing both sides by 0.35 we arrive at the solution:
x = 60

Answer 3

Or use a proportion\[35/100=21/x \rightarrow 35x=2100\rightarrow x=60\]