Question: how to calculate percentage of class 9?
Answer: % change = ((New value – Original Value) × 100) / Original Value.
% error = (error × 100) / real value.
Therefore, the percentage of boys in class = ( 60 × 100)/120.
So, Percentage = (25/100) × 10.
% = 0.25 × 10 = 2.5.
Percentage of riped apples = (10/60) × 100.
= (1/6) × 100.
Solution: 15% of 75 = (15/100) × 75 = 11.25.