Ashley is performing an experiment about evaporation for her science class. she places a bucket of water out in the sun and measures the water level in the bucket throughout the day.

if the bucket was 4/5 full at the beginning of the day and 1/5 full at the end of the day, by what fraction of the bucket did the water level decrease?

select one:
a. 4/25
b. 1/10
c. 3/5
d. 5/5