In a basketball court,
14 of the children wore glasses. After 121 children who wore glasses entered the basketball court, the percentage of children who wore glasses increased to 80%. 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 |
+ 121 |
|
After |
4x3 = 12 u |
1x3 = 3 u |
80% =
80100 =
45The 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
= 12 u - 1 u
= 11 u
11 u = 121
1 u = 121 ÷ 11 = 11
Number of children who did not wear glasses
= 3 u
= 3 x 11
= 33
Answer(s): 33