Mathematics, 27.09.2019 01:00 naenae6775

Ronnie wants to lower his utility bills to save money on his monthly expenses. he discovers that if he replaces his water heater with a solar water heater his monthly utility bills can decrease around 50% to 85%. at the end of the year ronnie wants to calculate the percentage his new solar water heater saved him in the utility bills compared to last year. ronnie? s total utility expenses for this year are $862.40 and last year the utility expenses were $1935.67. what percentage did ronnie save on his utlility bills by switching to a solar water heater?
a.
44.5%
b.
97.8%
c.
55.4%
d.
67.5%

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