关于一道GRE数学题 求解答过程及答案。。。
InNovembertheSmythehouseholdusedthesametotalamountofelectricityasinJuly,butthewaterhe...
In November the Smythe household used the same total amount of electricity as in July, but the water heater used 33 persent of this total amount . By approximately what percent did the amount of electricity used by the water heater increase from July to November?
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