If Wendy answered 21 questions correctly and obtained 70%, how many were on the test?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter7: Percents
Section7.2: Percents And Proportions
Problem 2E
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If Wendy answered 21 questions correctly and obtained 70%, how many were on the test?
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