Mathematics, 25.09.2019 00:30 helppppp3548

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. 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. 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%