Question

advanced percents
part 4 of 4 1 2 3 4 trying to earn:
please do this problem in your head if you can! you can use paper and pencil if you need to, but dont use a calculator.
90 microwave ovens in 10,000 produced by lindo products last year were returned.
what percent of the microwave ovens were not returned? %
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Explanation:

Step1: Calculate returned percentage

$\frac{90}{10000} \times 100\% = 0.9\%$

Step2: Subtract from total 100%

$100\% - 0.9\% = 99.1\%$

Answer:

99.1