Question

Write and solve a proportion to answer the question. What number a is 70% of 70

Answer 1

percent means parts out of 100
so 70%=70/100


'of' means multiply


we can do
$\frac{x}{70}=\frac{70}{100}$
that's the prooprtion

solving
$\frac{x}{70}=\frac{70}{100}$
$\frac{x}{70}=\frac{7}{10}$
times both sides by 70
$x=\frac{490}{10}$
$x=49$

the number is 49