Jenson, Carl and Colin collected buttons in the ratio of 8 : 7 : 7. After Colin gave ⁴₅ to Jenson and Carl, Colin had 202 less buttons than Jenson. The number of buttons that Carl had increased by 30%. How many buttons did Jenson and Colin have in the end?

	Jenson	Carl	Colin
Before	8 u	7 u	7 u
Change	+ 3.5 u	+ 2.1 u	- 5.6 u
After	11.5 u	9.1 u	1.4 u

Number of buttons that Colin gave to Jenson and Carl
= ⁴₅ x 7 u
= 5.6 u

Number of buttons that Carl received from Colin
= ³⁰₁₀₀ x 7 u
= 2.1 u

Number of buttons that Jenson received from Colin
= 5.6 u - 2.1 u
= 3.5 u

Number of less buttons that Colin had less than Jenson
= 11.5 u - 1.4 u 
= 10.1 u

10.1 u = 202

1 u = 202 ÷ 10.1 = 20

Number of buttons that Jenson and Colin had
= 11.5 u + 1.4 u
= 12.9 u
= 12.9 x 20
= 258

Answer(s): 258