PSLEAt first, Leah had a total of 63 red and blue balloons. 11 blue balloons burst. She then increased the number of red balloons by 80%. After that, Leah had a total of 76 balloons. How many blue balloons did she have at first?
|
Red |
Blue |
Total |
Before |
5 u |
|
63 |
Change |
+ 4 u |
- 11 |
+ 13 |
After |
9 u |
|
76 |
80100 =
45Increase in the number of balloons
= 76 - 63
= 13
4 u = 13 + 11
4 u = 24
1 u = 24 ÷ 4 = 6
Number of red balloons at first
= 5 u
= 5 x 6
= 30
Number of blue balloons at first
= 63 - 30
= 33
Answer(s): 33