The change (increase or decrease) from 80% to 60% is 20%.
80% - 60% = 20%
Write the change over the original amount.
20%/80%
Change to decimal form and simplify.
.20/.80 = .10/.40 = 1/4
Write 1/4 as a percent.
1/4 = 25%
Write 25% in decimal form.
Answer .25