Question

7 is 1/10 of what number?

Answer 1

7 is 1/10 of 70

is means equal in mathematics
of means multiplication

7 = 1/10 x a

Multiply by 10 on both sides

a = 70

Answer 2

The correct answer is: 7 is 1/10 of $\boxed{70}$.

Explanation:

Simply translate "1/10 of what number is 7" mathematically as follows:

$\frac{1}{10} * x = 7$ --- (1)

x represents "what number" in the sentence

= represents "is."

* represents "of."

Now evaluate equation(1) for x:

$\frac{1}{10} * x = 7 \\x=70$

Hence the correct answer is 7 is 1/10 of $\boxed{70}$.