Question

Three out of 7 students at the dance were boys if 140 students attended the dance how many were girls enter number of girls here ___

Answer 1

Answer:

80

Explanation:

We know that 3/7 people are boys. So, we know that 7/7-3/7, or 4/7 are girls.

We can find the total number of girls by multiplying that by 140.

$\frac{4}{7}$×140 is the same as $\frac{4}{1}$×20. Multiply 4 by 20, and we get 80!