# how to calculate percentages?

how do you calculate percentage of participation

### How do you i solve 49.99 plus tax?

You add the tax to 49.99. You have to know the percentage charged as tax. For example, if the tax is 5%, you calculate 5/100 x 49.99, and add it to 49.99. (You can also get this result faster, if you know a little about percentages: calculate 49.99 x 1.05 - assuming a 5% tax; multiply by 1.07 for a 7% tax, etc.). You add the tax to 49.99. You have to know the percentage…

### Are decimals just as important as whole numbers?

Of course! Without decimals, you couldn't calculate percentages or fractions. Decimals allow you to break a number up. A decimal is basically a fraction, and when you calculate fraction adding, subtraction, multiplication, and division, sometimes it is easier to calculate a fraction by first changing it to a decimal instead.