George had to paint some containers. On the first day, the number of containers he painted was 20% of the number of containers that he had not painted. One week later, he painted another 187 containers. As a result, the total number of painted containers became 16 more than ⁴₅ of the total number of containers. How many less containers were painted than unpainted on the first day?

	Painted	Not painted	Total
Before	1x5 = 5 u	5x5 = 25 u	6x5 = 30 u
Change	+ 187	- 187
After	5 u + 187	25 u - 187	30 u
Comparing painted and not painted containers in the end	4x6 + 16 = 24 u + 16	1x6 - 16 = 6 u - 16	5x6 = 30 u

20% = ²⁰₁₀₀ = ¹₅
Painted : Not painted = 1 : 5

The total number of containers remains unchanged. Make the total number of containers at first and in the end the same.  LCM of 6 and 5 is 30.

The number of containers painted in the end is repeated.

24 u + 16 = 5 u + 187
24 u - 5 u = 187 - 16
19 u = 171

1 u = 171 ÷ 19 = 9

Number of less containers that were painted than not painted on the first day
= 25 u - 5 u
= 20 u
= 20 x 9
= 180

Answer(s): 180