# A sixth grader weighs 90 pounds, which is 120% of what he weighed in fourth grade. How much did he weigh in fourth grade?

Dec 14, 2016

75lbs

#### Explanation:

Let x be the weight in fourth grade.
120%*x = 90
$\frac{120}{100} = 1.2$
$1.2 x = 9 0$
$x = \frac{90}{1.2}$
x = 75 lbs