How to Calculate Percentage Increase and Sales Price

How can we calculate the percentage increase in height and sales price reduction?

a) What was the percent increase in the child's height?

b) What is the new bank account balance after a 4% increase?

c) What was the original retail price of the jeans that are now on sale for $40?

Answers:

a) The percent increase in the child's height is 20.83%.

b) The new bank account balance is $1,508.

c) The original retail price of the jeans was $61.54.

a) To calculate the percent increase in the child's height, we use the formula: ((new value - old value) / old value) * 100. Applying this formula: ((29 - 24) / 24) * 100 = 20.83% (rounded to two decimal places).

b) To calculate the new bank account balance, we multiply the current balance by the increase percentage: $1,450 * (1 + 0.04) = $1,508.

c) To calculate the original retail price of the jeans, we can set up the equation: sale price = original price - (original price * 0.35). Solving for the original price: $40 = original price - (0.35 * original price). Simplifying the equation: $40 = original price * (1 - 0.35). Dividing both sides by (1 - 0.35): original price = $40 / (1 - 0.35) = $61.54.