Cathy and Joelle have 336 coins altogether. Joelle has thrice as many coins as Cathy. How many coins must Joelle give to Cathy so that they have the same number of coins?
| |
Cathy |
Joelle |
Total |
| Before |
1 u |
3 u |
336 |
| Change |
+ ? |
- ? |
|
| After |
168 |
168 |
336 |
Total number of coins that Cathy and Joelle have
= 1 u + 3 u
= 4 u
4 u = 336
1 u = 336 ÷ 4 = 84
Number of coins that Cathy and Joelle each has in the end
= 336 ÷ 2
= 168
Number of coins that Joelle must give to Cathy
= 168 - 84
= 84
Answer(s): 84
