Problem: What is the answer?
John has 542 points in his math class. He must have 71% of the 1000 points possible by the end of the term to receive credit for the class. What is the minimum number of additional points he must earn by the end of the term to receive credit for the class.
He needs 71% of 1000 or 0.71 * 1000 = 710 points.
He needs an additional 710 - 542 = 168 points to reach the minimum.