An arrangement of flowers originally priced at $48.00 is marked down to $39.00. what is the percent of decrease, rounded to the nearest whole number?

To find the percentage of decrease, use this formula.

Percentage decrease=  old amount- new amount

                                               old amount

So subtract 48 by 39 which is 9.

Divide it by 48, which is  0.1875.

DO NOT STOP THERE! Multiply that by 100 to get the percent amount, then round it off, which is 19%.