There are 20 balls in the bag altogether.
If 12 of them are not blue, that means that 8 of them are blue. We can find out what percent of the blue balls are in the bag by turning it into a fraction.
The fraction [tex]\frac{8}{20}[/tex] represents the 8 blue balls out of the 20 balls altogether.
Now that we have our fraction, we can change it into a percent. The fraction [tex]\frac{8}{20}[/tex] can be reduced to [tex]\frac{2}{5}[/tex] by dividing both the numerator and denominator by the greatest common factor.
2 ÷ 5 = 0.4
0.4 x 100 = 40%
40% of the balls in the bag are blue.
