Copier Q prints at a rate of 93 leaflets in every 3 minutes and Copier R prints at a rate of 140 leaflets in every 5 minutes. At 6 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 8 p.m., the total number of leaflets printed during the past two hours was 7952. 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 = 93 ÷ 3 = 31
Number of leaflets Copier R prints per min = 140 ÷ 5 = 28

From 6 p.m. to 8 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of leaflets printed by Copier R in 6 h
= 120 x 28
= 3360

Number of leaflets printed by Copier Q in 6 h
= 7952 - 3360
= 4592

Percentage of the number of leaflets that Copier Q printed over the total number of leaflets printed
= ⁴⁵⁹²₇₉₅₂ x 100%
≈ 57.75%

Answer(s): 57.75%