PSLEAt first, Leah had a total of 64 gold and yellow balloons. 19 yellow balloons burst. She then increased the number of gold balloons by 80%. After that, Leah had a total of 65 balloons. How many yellow balloons did she have at first?
|
Gold |
Yellow |
Total |
Before |
5 u |
|
64 |
Change |
+ 4 u |
- 19 |
+ 1 |
After |
9 u |
|
65 |
80100 =
45Increase in the number of balloons
= 65 - 64
= 1
4 u = 1 + 19
4 u = 20
1 u = 20 ÷ 4 = 5
Number of gold balloons at first
= 5 u
= 5 x 5
= 25
Number of yellow balloons at first
= 64 - 25
= 39
Answer(s): 39