Mathematics, 25.09.2019 00:30, rydro6915

John's sister went shopping with him. she expected to spend $100 on clothes, but spent only $10. john wanted to her calculate the percent error, but he thinks he may have made a mistake. are his calculations below correct? why or why not?
{$100-$10}/90 =10/90 = 11%

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John's sister went shopping with him. she expected to spend $100 on clothes, but spent only $10. joh...