Stuck? Start here. Read the steps, try the problem, then check your answer.
I can…
I can find the percent of a number using an equation or a model.
Key words
Percent — A way to compare a number to 100, shown with the % sign.
Base — The whole amount you take a percent of.
Part — The piece you get when you take a percent of a number.
Equation — A math sentence with an equal sign showing both sides are the same.
Discount — Money taken off the first price to make it cheaper.
Steps
The claw machine is 25% off its 60-ticket price. I want the discount.
First I change 25% to a decimal: 25 ÷ 100 = 0.25.
Then I multiply by the base: 0.25 × 60 = 15.
So the discount is 15 tickets. The part is 15.
Try it
What is 45% of 360?
Check your answer
162
45% = 0.45. Multiply: 0.45 × 360 = 162. A student who answers 45 wrote the percent number itself instead of finding the part. A student who answers 315 subtracted the percent number from the base (360 − 45) instead of multiplying. A student who answers 180 rounded 45% up to 50% before multiplying (0.50 × 360). Always convert the exact percent to a decimal, then multiply by the base.
Sentence starter
I know ___ because ___.
Goal: I can explain my steps using the words percent, base, part, and equation.