PSLEAt first, Leah had a total of 78 white and red balloons. 18 red balloons burst. She then increased the number of white balloons by 80%. After that, Leah had a total of 96 balloons. How many red balloons did she have at first?
|
White |
Red |
Total |
Before |
5 u |
|
78 |
Change |
+ 4 u |
- 18 |
+ 18 |
After |
9 u |
|
96 |
80100 =
45Increase in the number of balloons
= 96 - 78
= 18
4 u = 18 + 18
4 u = 36
1 u = 36 ÷ 4 = 9
Number of white balloons at first
= 5 u
= 5 x 9
= 45
Number of red balloons at first
= 78 - 45
= 33
Answer(s): 33