In a parade square,
38 of the children wore ties. After 56 children who wore ties left the parade square, the percentage of children who wore ties decreased to 20%. How many children in the parade square did not wear ties?
| |
Wore ties |
Did not wear ties |
| Before |
3x4 =
12 u |
5x4 =
20 u |
| Change |
- 56 |
|
| After |
1x5 =
5 u |
4x5 =
20 u |
20% =
20100 =
15The number of children who did not wear ties remains unchanged. LCM of 5 and 4 is 20.
Number of children who wore ties and left
= 12 u - 5 u
= 7 u
7 u = 56
1 u = 56 ÷ 7 = 8
Number of children who did not wear ties
= 20 u
= 20 x 8
= 160
Answer(s): 160
