camila1525sanchez camila1525sanchez

06-11-2020
Mathematics

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A student answers 70% of the questions on a math exam correctly. If he answers 21 questions correctly , how many questions are on the exam ?

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asdfghdrty2356 asdfghdrty2356

07-11-2020

Answer:

There are 30 questions

Step-by-step explanation:

70%=21

70%÷7=10%

21÷7=3

10%=3

10%×10=100%

3×10=30

Hope this helped :)

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