Copier Q prints at a rate of 105 leaflets in every 5 minutes and Copier R prints at a rate of 126 leaflets in every 6 minutes. At 4 p.m., both copiers started printing. After a while, Copier Q stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier R continued printing during this time. At 7 p.m., the total number of leaflets printed during the past three hours was 6977. Express the number of leaflets printed by Copier Q as a percentage of the total number of leaflets printed by both copiers. Round off your answer to 2 decimal places.
Number of leaflets Copier Q prints per min = 105 ÷ 5 = 21
Number of leaflets Copier R prints per min = 126 ÷ 6 = 21

From 4 p.m. to 7 p.m. = 3 h
1 h = 60 min
3 h = 180 min

Number of leaflets printed by Copier R in 4 h
= 180 x 21
= 3780

Number of leaflets printed by Copier Q in 4 h
= 6977 - 3780
= 3197

Percentage of the number of leaflets that Copier Q printed over the total number of leaflets printed
= ³¹⁹⁷₆₉₇₇ x 100%
≈ 45.82%

Answer(s): 45.82%