Copier A prints at a rate of 104 flyers in every 4 minutes and Copier B prints at a rate of 136 flyers in every 4 minutes. At 7 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 9 p.m., the total number of flyers printed during the past two hours was 8189. Express the number of flyers printed by Copier A as a percentage of the total number of flyers printed by both copiers. Round off your answer to 2 decimal places.
Number of flyers Copier A prints per min = 104 ÷ 4 = 26
Number of flyers Copier B prints per min = 136 ÷ 4 = 34

From 7 p.m. to 9 p.m. = 2 h
1 h = 60 min
2 h = 120 min

Number of flyers printed by Copier B in 7 h
= 120 x 34
= 4080

Number of flyers printed by Copier A in 7 h
= 8189 - 4080
= 4109

Percentage of the number of flyers that Copier A printed over the total number of flyers printed
= ⁴¹⁰⁹₈₁₈₉ x 100%
≈ 50.18%

Answer(s): 50.18%