Tom has
57 as many buttons as Henry. They have a total of 300 buttons. How many buttons must Henry give to Tom so that they will have the same number of buttons?
|
Tom |
Henry |
Total |
Before |
5 u |
7 u |
12 u |
Change |
+ ? |
- ? |
|
After |
150 |
150 |
300 |
Total number of buttons
= 5 u + 7 u
= 12 u
12 u = 300
1 u = 300 ÷ 12 = 25
Number of buttons that each of them has in the end
= 300 ÷ 2
= 150
Number of buttons that Tom has
= 5 u
= 5 x 25
= 125
Number of buttons that Henry must give Tom
= 150 - 125
= 25
Answer(s): 25