PSLEAt first, Leah had a total of 49 brown and red balloons. 15 red balloons burst. She then increased the number of brown balloons by 80%. After that, Leah had a total of 46 balloons. How many red balloons did she have at first?
|
Brown |
Red |
Total |
Before |
5 u |
|
49 |
Change |
+ 4 u |
- 15 |
- 3 |
After |
9 u |
|
46 |
80100 =
45Decrease in the number of balloons
= 49 - 46
= 3
4 u = 15 - 3
4 u = 12
1 u = 12 ÷ 4 = 3
Number of brown balloons at first
= 5 u
= 5 x 3
= 15
Number of red balloons at first
= 49 - 15
= 34
Answer(s): 34