1% is 1⁄100. Work out 1% by dividing by 100. This building block of 1% can be multiplied to find other percentages. For example, to find 2% multiply 1% by 2. To find 3%, multiply 1% by 3.

Here's an example for a generic home improvement project. First, calculate the percentage over budget for the total budget to get an understanding of the overall project. Start by finding the ...