Solving percentage problems

25% of _________ = 342

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CCSS.7.RP.A.2

CCSS.7.RP.A.3

Dora says you can find 5% by finding 10% and doubling it.

Is she correct?

• Yes

• No

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CCSS.7.RP.A.2

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40% of 80 > 80% of 40

Do you agree? Explain your answer.

• Yes because 80 is bigger than 40.

• No. 40% of 80 is 32 and 80% of 40 is 32, so they are equal.

• No because 80% is bigger than 40%.

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CCSS.7.RP.A.2

CCSS.7.RP.A.3

60% of 400 =

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CCSS.7.RP.A.2

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Workers in a factory aim to pack 3,640 boxes a day.

At 10am, they have packed 25% of the boxes. How many more boxes do they need to pack?

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CCSS.7.EE.B.3

CCSS.7.NS.A.3

CCSS.7.RP.A.3

Dexter has some chocolate.

He gives 20% to Annie and eats 40% of what he has left.

He puts the remaining 72g into the fridge for later.

True or False: Dexter started with 150g of chocolate.

• True

• False

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CCSS.7.EE.B.3

CCSS.7.NS.A.1

CCSS.7.NS.A.3

CCSS.7.RP.A.3

Leona has a large bag of apples.

There are 180 apples in the bag.

She uses 1/4 of the apples to make some juice.

She uses 20% of the apples to make a pie.

How many apples are left?

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CCSS.7.EE.B.3

CCSS.7.NS.A.1

CCSS.7.NS.A.2

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CCSS.7.RP.A.3

What percentage of the counters are blue?

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CCSS.7.RP.A.2

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What percentage of the counters are yellow?

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CCSS.7.RP.A.2

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50% of a number is 32.

What is the number?

• 64

• 16

• 128

• 8

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CCSS.7.EE.B.4

CCSS.7.RP.A.2

CCSS.7.RP.A.3