To find the answer, you first need to make an equation.
(Let x be the unknown number we are solving for)
82 / (70/100)=x
(divide the two numbers as given to find x, follow PEMDAS)
117.143 = x
Because you are not finding what 70% of 82 is, you need to divide 82 by 70% instead of multiply by 70% like the other person who answered did.
