Estimating with Percents

The Watch Store is having a sale on watches. Every watch is on sale for 60% of the regular price. About how much would you pay for a watch that normally sells for $34.99?

The word about tells you that an exact answer is not needed.
So, you can estimate the answer. When you estimate with percents, you  should round the percent to a fraction that is easy to multiply. The chart shows some commonly-used percents and their fraction equivalents.