PSLEAt first, Leah had a total of 73 red and white balloons. 12 white balloons burst. She then increased the number of red balloons by 90%. After that, Leah had a total of 88 balloons. How many white balloons did she have at first?
|
Red |
White |
Total |
Before |
10 u |
|
73 |
Change |
+ 9 u |
- 12 |
+ 15 |
After |
19 u |
|
88 |
90100 =
910Increase in the number of balloons
= 88 - 73
= 15
9 u = 15 + 12
9 u = 27
1 u = 27 ÷ 9 = 3
Number of red balloons at first
= 10 u
= 10 x 3
= 30
Number of white balloons at first
= 73 - 30
= 43
Answer(s): 43