Seven minutes ago, 70% of the children in a parade square were boys. 87 more children entered the parade square. As a result, the number of boys increased by 40% and the number of girls increased by 60%. How many children are in the parade square now?
| |
Boys |
Girls |
Total |
| Before |
10 u |
3 u |
13 u |
| Change |
+ 4 u |
+ 1.8 u |
+ 5.8 u |
| After |
14 u |
4.8 u |
18.8 u |
70% =
70100 =
710Number of more boys who entered the parade square
= 40% x 10 u
=
40100 x 10 u
= 4 u
Number of more girls who entered the parade square
= 60% x 3 u
=
60100 x 3 u
= 1.8 u
Total number of more children who entered the parade square
= 4 u + 1.8 u
= 5.8 u
5.8 u = 87
1 u = 87 ÷ 5.8 = 15
Number of children in the parade square now
= 14 u + 4.8 u
= 18.8 u
= 18.8 x 15
= 282
Answer(s): 282
