Finding Percents Mentally

How Do You Find Percents Mentally Using Fractions?

Some fractions are seen so often in math that it can be helpful to know the percent that goes with it. This tutorial shows you some common percent-fraction relationships!
How Do You Mentally Find Percents That are Powers of 10?

If you're finding the percent of a number and that percent is a power of 10, there's a trick to quickly find the answer! This tutorial explains how to calculate percents that are powers of 10.