Ten minutes ago, 75% of the students in a parade square were boys. 34 more students entered the parade square. As a result, the number of boys increased by 25% and the number of girls increased by 70%. How many students are in the parade square now?
| |
Boys |
Girls |
Total |
| Before |
4 u |
1 u |
5 u |
| Change |
+ 1 u |
+ 0.7 u |
+ 1.7 u |
| After |
5 u |
1.7 u |
6.7 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
= 70% x 1 u
=
70100 x 1 u
= 0.7 u
Total number of more students who entered the parade square
= 1 u + 0.7 u
= 1.7 u
1.7 u = 34
1 u = 34 ÷ 1.7 = 20
Number of students in the parade square now
= 5 u + 1.7 u
= 6.7 u
= 6.7 x 20
= 134
Answer(s): 134
