PSLEAt first, Leah had a total of 63 brown and red balloons. 18 red balloons burst. She then increased the number of brown balloons by 75%. After that, Leah had a total of 60 balloons. How many red balloons did she have at first?
|
Brown |
Red |
Total |
Before |
4 u |
|
63 |
Change |
+ 3 u |
- 18 |
- 3 |
After |
7 u |
|
60 |
75100 =
34Decrease in the number of balloons
= 63 - 60
= 3
3 u = 18 - 3
3 u = 15
1 u = 15 ÷ 3 = 5
Number of brown balloons at first
= 4 u
= 4 x 5
= 20
Number of red balloons at first
= 63 - 20
= 43
Answer(s): 43