Solve the following percentage by increasing. a=90 by 10% b= 75 by 25%

To increase a number by a certain percentage, you can use the following formula: Increased Value = Original Value + (Original Value * Percentage Increase / 100) Let's calculate the increases for the given values: a) Increase 90 by 10%: Increased Value = 90 + (90 * 10 / 100) Increased Value = 90 + 9 Increased Value = 99 So, when you increase 90 by 10%, you get 99. b) Increase 75 by 25%: Increased Value = 75 + (75 * 25 / 100) Increased Value = 75 + 18.75 Increased Value = 93.75 When you increase 75 by 25%, you get 93.75.