# college math

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Last month Bill's electric bill was \$80.77. This month it is \$69.06. what is the percent decrease?

\$80.77 - \$69.06 = \$11.71 , I don't understand multiply decimal by 100 to get the decrease

• college math -

You only did the first part.

You forgot to divide 11.71 by 80.77

100 (11.71 / 80.77) = ?

• college math -

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