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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?

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?
asked 92.5k views
5 votes
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?

asked
User Marmistrz
by
7.8k points

1 Answer

2 votes
There are 30 questions in all
answered
User Teshia
by
8.6k points
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