Sylvia has completed 8 map exercises e. This is one fourth of the assignment. How many exercise were assigned?

One fourth is 1 in 4 parts of a whole, so imagine a pie cut into 4 pieces and one of those pieces would be a fourth.

Since Sylvia completed 8 map exercises, which is one fourth of the assignment, total number exercises in the assignment would be 8 ·4, which is 32 exercises.