It takes Sofia c minutes to cycle from the library to the mall. It takes 1/8 of the time cycling to travel the same distance walking. Walking takes w

If it takes c minutes to travel from library to mall, and 1/8 to cycle the same distance walking.

So, if the cycle takes x minutes, then the walking takes:

cycle = (1/8) w

x = (1/8) w

w = 8x

hence walking takes 8 times the time used by cycling.