Part and Whole

Define percentage, rate or percent and base.

Identify the base, percentage and rate in a problem.

Find the percentage in a given problem.

The rate is the percent, or the number in a hundredth parts.

The base is the total, or the whole quantity.

The percentage is the fraction of the base determined by the rate.

Formula to get the rate or percent is

Rate = Percentage / Base X 100%

Remember this simple formula: P = R x B

Given are the rate is 28% and base is 1800

We are looking for the percentage which is the number we are to find.

Using the P = R x B formula, P = 28% or 28/100 or 0.28 is the rate. We always convert the % to decimal form to be able to solve the problem.

To Solve: 0.28 x 1800 = 504

Answer: 504 out of 1800 ALS learners are girls.