Simple calculations
Not so simple
Estimates
Applications
100
10% of 250
What is 25
100

33.3% of 7.2

What is 2.4

100

Estimate 12% of $50 by rounding the percent.

What is about $5

12% --> 10%

10% of $50 = $5


100

A $60 video game is on sale for 35%. Name the sale price.

$39

200

50% of 180

What is 90

200

18% of 50

What is 9

200

Estimate 32% of $99 by rounding the number.

what is $32

200

A $40 shirt is 10% off. What is the discount?

$4

300

20% of 150

What is 30

300

22% of 90

What is 19.8

300

Estimate 46% of 198 by rounding both the percent and the number.

What is 100

Round 46% → 50%, 198 → 200.
Answer: ~50% of 200 = 100

300

A $120 skateboard has a 25% discount. What is the sale price?

25% of 120 = 30;
120 − 30 = 90

Answer: $90

400

25% of 80

What is 20

400

17% of 250

What is 42.5

400

Estimate 35% of $142 by rounding both the percent and the amount.

What is about $56

400

A $25 lunch gets a 20% tip. How much is the tip?

What is $5

500

5% of 760

What is 38

500

35% of 142

What is 49.7

500

Estimate 63% of 87

63% --> 60%

87 --> 90

60% of 90 = 54

500

A $72 hoodie is now 15% off. What is the discount?

Answer: $10.80