last month bill's electric bill was $80.77. This month , bill bill was $69.06. what is the%degrease

Answer 1

degrease? You sure it's electric, and not plumbing?

the decrease is 80.77-69.06 = 11.71

as a percent of the bill, 11.71/80.77 = .1449 = 14.49%

Answer 2

%decrease=(decrement / initial)x 100
=(80.77-69.06)/80.77 x 100
=11.71/80.77 x100
=14.497%