Wesley had to paint some containers. On the first day, the number of containers he painted was 40% of the number of containers that he had not painted. One week later, he painted another 71 containers. As a result, the total number of painted containers became 26 more than ¹₂ of the total number of containers. How many more containers were unpainted than painted on the first day?

	Painted	Not painted	Total
Before	2x2 = 4 u	5x2 = 10 u	7x2 = 14 u
Change	+ 71	- 71
After	4 u + 71	10 u - 71	14 u
Comparing painted and not painted containers in the end	1x7 + 26 = 7 u + 26	1x7 - 26 = 7 u - 26	2x7 = 14 u

40% = ⁴⁰₁₀₀ = ²₅
Painted : Not painted = 2 : 5

The total number of containers remains unchanged. Make the total number of containers at first and in the end the same.  LCM of 7 and 2 is 14.

The number of containers painted in the end is repeated.

7 u + 26 = 4 u + 71
7 u - 4 u = 71 - 26
3 u = 45

1 u = 45 ÷ 3 = 15

Number of more containers that were not painted than painted on the first day
= 10 u - 4 u
= 6 u
= 6 x 15
= 90

Answer(s): 90