IM 7.4.12 Practice: Finding the Percentage

A music store marks up the instruments it sells by 30%.

If the store bought a guitar for $45, what will be its store price?

If the price tag on a trumpet says $104, how much did the store pay for it?

If the store paid $75 for a clarinet and sold it for $100, did the store mark up the price by 30%?

A family eats at a restaurant. The bill is $42. The family leaves a tip and spends $49.77.

How much was the tip in dollars?

How much was the tip as a percentage of the bill?

The price of gold is often reported per ounce. At the end of 2005, this price was $513. At the end of 2015, it was $1060. By what percentage did the price per ounce of gold increase?

A phone keeps track of the number of steps taken and the distance traveled.

Based on the information in the table, is there a proportional relationship between the two quantities? Explain your reasoning.

Noah picked 3 kg of cherries. Mai picked half as many cherries as Noah. How many total kg of cherries did Mai and Noah pick?

[math]1+\frac{1}{2}\cdot3[/math] [math]3+\frac{1}{2}[/math] [math]\left(1+\frac{1}{2}\right)\cdot3[/math] [math]3−\frac{1}{2}[/math]

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Informação: IM 7.4.12 Practice: Finding the Percentage