Peter, Harry and Charlie collected erasers in the ratio of 10 : 9 : 5. After Charlie gave ⁴₅ to Peter and Harry, Charlie had 103 less erasers than Peter. The number of erasers that Harry had increased by 30%. How many erasers did Peter and Charlie have in the end?

	Peter	Harry	Charlie
Before	10 u	9 u	5 u
Change	+ 1.3 u	+ 2.7 u	- 4 u
After	11.3 u	11.7 u	1 u

Number of erasers that Charlie gave to Peter and Harry
= ⁴₅ x 5 u
= 4 u

Number of erasers that Harry received from Charlie
= ³⁰₁₀₀ x 9 u
= 2.7 u

Number of erasers that Peter received from Charlie
= 4 u - 2.7 u
= 1.3 u

Number of less erasers that Charlie had less than Peter
= 11.3 u - 1 u 
= 10.3 u

10.3 u = 103

1 u = 103 ÷ 10.3 = 10

Number of erasers that Peter and Charlie had
= 11.3 u + 1 u
= 12.3 u
= 12.3 x 10
= 123

Answer(s): 123