IXL | Multi-step problems with percents

While Mike was visiting his sister in Arlington, he bought an aquarium that was marked down 60% from an original price of $100. If the sales tax in Arlington is 5%, what was the total cost of the aquarium?

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question

While on vacation in Belmont, Lara went out for a dinner that cost $75. If sales tax in Belmont is 8% and Lara left a 20% tip on $75, what was the total cost of her meal?

key idea

Tax formula:

tax

tax percentage

amount

Tip formula:

tip

tip percentage

amount

solution

First find the tax. Write 8% as the decimal 0.08 before using it in the equation.

tax

tax percentage

amount

0.08

The tax was

Now find the tip. Write 20% as the decimal 0.20 before using it in the equation.

tip

tip percentage

amount

0.20

The tip was

Finally, find the total cost.

total cost

cost + tax

tip

The total cost was

Looking for more? Try these:

Lesson: Percent change

$Confetti$

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Teacher tools

Work it out

Not feeling ready yet? These can help:

P.6Percent of a number: tax, discount, and more

O.8Solve percent equations

D.1Add and subtract decimals

Lesson: Percent change

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