Min and Nora collected buttons. Min gave 25% of her buttons to Nora and as a result, Nora's buttons increased by 30%. If Min had 54 buttons left, find the number of buttons Nora should give to Min in the end so that both had an equal number of buttons.
| |
Min
|
Nora |
Comparing the change
in Nora's buttons
|
|
Before
|
4x3 =
12 u |
|
10x1 =
10u |
|
Change
|
- 1x3 =
- 3 u
|
+ 1x3 =
+ 3 u
|
+ 3x1 =
+ 3 u
|
|
After
|
3x3 =
9 u
|
|
13x1 =
13 u |
25% =
25100 =
1430% =
30100 =
310The increase in the number of buttons that Nora had is repeated. Make the increase in the number of buttons that Nora had the same. LCM of 1 and 3 = 3
9 u = 54
1 u = 54 ÷ 9 = 6
Number of buttons that Nora had more than Min in the end
= 13 u - 9 u
= 4 u
Number of buttons that Nora should give to Min so that both had an equal number of buttons in the end
= 4 u ÷ 2
= 2 u
= 2 x 6
= 12
Answer(s): 12
