Hazel and Hilda collected stickers. Hilda gave 80% of her stickers to Hazel. As a result, Hazel's stickers increased by 30%. If Hazel had 520 stickers left, find the total number of stickers the two girls had at first.
| |
Comparing the change
in Hilda's stickers |
Hilda |
Hazel |
| Before |
5x3 =
15 u |
|
10x4 =
40 u |
| Change |
- 4x3 =
- 12 u |
- 3x4 =
- 12 u |
+ 3x4 =
+ 12 u |
| After |
1x3 =
3 u |
|
13x4 =
52 u |
80% =
80100 =
45 30% =
30100 =
310 The number of stickers that Hazel gave to Hilda is repeated. Make the number of stickers that Hazel gave to Hilda the same. LCM of 3 and 4 is 12.
Number of stickers that Hazel had in the end = 52 u
52 u = 520
1 u = 520 ÷ 52 = 10
Number of stickers that Hilda and Hazel had at first
= 15 u + 40 u
= 55 u
= 55 x 10
= 550
Answer(s): 550
