PSLEAt first, Leah had a total of 43 white and purple balloons. 18 purple balloons burst. She then increased the number of white balloons by 75%. After that, Leah had a total of 31 balloons. How many purple balloons did she have at first?
|
White |
Purple |
Total |
Before |
4 u |
|
43 |
Change |
+ 3 u |
- 18 |
- 12 |
After |
7 u |
|
31 |
75100 =
34Decrease in the number of balloons
= 43 - 31
= 12
3 u = 18 - 12
3 u = 6
1 u = 6 ÷ 3 = 2
Number of white balloons at first
= 4 u
= 4 x 2
= 8
Number of purple balloons at first
= 43 - 8
= 35
Answer(s): 35