PSLEAt first, Leah had a total of 46 gold and yellow balloons. 18 yellow balloons burst. She then increased the number of gold balloons by 80%. After that, Leah had a total of 40 balloons. How many yellow balloons did she have at first?
|
Gold |
Yellow |
Total |
Before |
5 u |
|
46 |
Change |
+ 4 u |
- 18 |
- 6 |
After |
9 u |
|
40 |
80100 =
45Decrease in the number of balloons
= 46 - 40
= 6
4 u = 18 - 6
4 u = 12
1 u = 12 ÷ 4 = 3
Number of gold balloons at first
= 5 u
= 5 x 3
= 15
Number of yellow balloons at first
= 46 - 15
= 31
Answer(s): 31