Participation in a school club rises from 42% to 51%. By how many percentage points did it rise? Enter the number of percentage points.
الإجابة الصحيحة
9
الشرح
Percentage-point change is direct subtraction, so 51 - 42 = 9 percentage points. Dividing 9 by 42 would instead calculate a relative increase of about 21.43%, a different measure.