PSLE Usha had 51 paperclips and Abi had 21 paperclips. After Usha gave some of her paperclips to Abi, the number of paperclips Usha and Abi had was in the ratio 4 : 5. How many paperclips did Usha have in the end?
|
Usha |
Abi |
Total |
Before |
51 |
21 |
72 |
Change |
- ? |
+ ? |
|
After |
4 u |
5 u |
9 u |
Total number of paperclips
= 51 + 21
= 72
Total number of paperclips
= 4 u + 5 u
= 9 u
9 u = 72
1 u = 72 ÷ 9 = 8
Number of paperclips that Usha had in the end
= 4 u
= 4 x 8
= 32
Answer(s): 32