Percent Review Solutions and Explanations

Start by reviewing the basic concept of finding a percentage of a given number. For example, to calculate 20% of 150, multiply 150 by 0.20. The result, 30, is 20% of 150.

Next, practice solving problems that involve percentage increase or decrease. For instance, if a price increases from $50 to $60, the percentage increase is calculated by dividing the difference ($10) by the original amount ($50) and multiplying by 100, resulting in a 20% increase.

Check your work after each calculation. Make sure that the operations are performed in the correct order and that units are consistent. If working with discounts, taxes, or profits, ensure that the percentage is applied to the correct value.

For more complex scenarios, break the problem into smaller steps. Begin with converting the percentage to a decimal, then follow through with the necessary arithmetic operations to solve for the unknown.