In a basketball court,
17 of the boys wore spectacles. After 46 boys who wore spectacles entered the basketball court, the percentage of boys who wore spectacles increased to 80%. How many boys in the basketball court did not wear spectacles?
|
Wore spectacles |
Did not wear spectacles |
Before |
1x1 = 1 u |
6x1 = 6 u |
Change |
+ 46 |
|
After |
4x6 = 24 u |
1x6 = 6 u |
80% =
80100 =
45The number of boys who did not wear spectacles remains unchanged. LCM of 6 and 1 is 6.
Number of boys who wore spectacles and left
= 24 u - 1 u
= 23 u
23 u = 46
1 u = 46 ÷ 23 = 2
Number of boys who did not wear spectacles
= 6 u
= 6 x 2
= 12
Answer(s): 12