Copier A prints at a rate of 116 leaflets in every 2 minutes and Copier B prints at a rate of 138 leaflets in every 6 minutes. At 2 p.m., both copiers started printing. After a while, Copier A stopped printing for some time as the ink cartridges were being changed before it continued to print again. Copier B continued printing during this time. At 4 p.m., the total number of leaflets printed during the past two hours was 7951. Express the number of leaflets printed by Copier A 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 A prints per min = 116 ÷ 2 = 58
Number of leaflets Copier B prints per min = 138 ÷ 6 = 23

From 2 p.m. to 4 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of leaflets printed by Copier B in 2 h
= 120 x 23
= 2760

Number of leaflets printed by Copier A in 2 h
= 7951 - 2760
= 5191

Percentage of the number of leaflets that Copier A printed over the total number of leaflets printed
= ⁵¹⁹¹₇₉₅₁ x 100%
≈ 65.29%

Answer(s): 65.29%