In a basketball court,
14 of the children wore glasses. After 40 children who wore glasses entered the basketball court, the percentage of children who wore glasses increased to 75%. How many children in the basketball court did not wear glasses?
| |
Wore glasses |
Did not wear glasses |
| Before |
1x1 =
1 u |
3x1 =
3 u |
| Change |
+ 40 |
|
| After |
3x3 =
9 u |
1x3 =
3 u |
75% =
75100 =
34The number of children who did not wear glasses remains unchanged. LCM of 3 and 1 is 3.
Number of children who wore glasses and left
= 9 u - 1 u
= 8 u
8 u = 40
1 u = 40 ÷ 8 = 5
Number of children who did not wear glasses
= 3 u
= 3 x 5
= 15
Answer(s): 15
