Jeremy and Ahmad had 113 notebooks together. Jeremy had 23 more notebooks than Ahmad. Both of them sold some of their notebooks. Ahmad sold 25% less notebooks than what Jeremy sold. In the end, Ahmad had half as many notebooks left as Jeremy. How many notebooks had Jeremy left?

	Jeremy (1)	Ahmad (2)	Make p the same (2)x2 = (3)
Comparing Jeremy and Ahmad at first	23 more
Before	68	45	90
Change	- 4 u	- 3 u	- 6 u
After	2 p	1 p	2 p

Number of notebooks that Ahmad had at first
= (113 - 23) ÷ 2
= 90 ÷ 2
= 45

Number of notebooks that Jeremy had at first
= 45 + 23
= 68

Number of notebooks that Ahmad sold in percent
= 100% - 25%
= 75%

75% = ⁷⁵₁₀₀ = ³₄

Make p the same.

(1) = (3)
68 - 4 u = 90 - 6 u
6 u - 4 u = 90 - 68
2 u = 22

1 u = 22 ÷ 2 = 11

Number of notebooks that Jeremy had left
= 68 - 4 u
= 68 - 4 x 11
= 68 - 44
= 24

Answer(s): 24