Cody had 70% fewer chocolate bars than Sam. After Sam gave 363 chocolate bars to Cody, Cody had ²₃ as many chocolate bars as Sam. How many chocolate bars did each of them have in the end?

1. Sam
2. Cody

	Cody	Sam	Total
Before	3x5 = 15 u	10x5 = 50 u	13x5 = 65 u
Change	+ 363	- 363
After	2x13 = 26 u	3x13 =  39 u	5x13 = 65 u

Number of chocolate bars that Cody had at first in percentage
= 100% - 70%
= 30%

30% = ³⁰₁₀₀ = ³₁₀

The total number of chocolate bars at first and in the end remains unchanged. Make the total number of chocolate bars the same. LCM of 5 and 13 is 65.

Number of chocolate bars that Sam gave to Cody
= 50 u - 39 u
= 11 u

11 u = 363

1 u = 363 ÷ 11 = 33

Number of chocolate bars that Cody had in the end
= 26 u
= 26 x 33
= 858

Number of chocolate bars that Sam had in the end
= 39 u
= 39 x 33
= 1287

Answer(s): (a) 858; (b) 1287