Six minutes ago, 75% of the students in a parade square were boys. 36 more students entered the parade square. As a result, the number of boys increased by 25% and the number of girls increased by 80%. How many students are in the parade square now?
|
Boys |
Girls |
Total |
Before |
4 u |
1 u |
5 u |
Change |
+ 1 u |
+ 0.8 u |
+ 1.8 u |
After |
5 u |
1.8 u |
6.8 u |
75% =
75100 =
34Number of more boys who entered the parade square
= 25% x 4 u
=
25100 x 4 u
= 1 u
Number of more girls who entered the parade square
= 80% x 1 u
=
80100 x 1 u
= 0.8 u
Total number of more students who entered the parade square
= 1 u + 0.8 u
= 1.8 u
1.8 u = 36
1 u = 36 ÷ 1.8 = 20
Number of students in the parade square now
= 5 u + 1.8 u
= 6.8 u
= 6.8 x 20
= 136
Answer(s): 136