percents, fractions, decimals, proportions

decimal to fraction

100

.70=

70/100

200

.8=

8/10

300

.123=

123/1000

400

.06=

6/100

500

.0015=

15/10,000

fraction to decimal

100

15/100=

.15

200

6/10=

.6

300

4/100=

.04

400

43/1000=

.043

500

5/10,000=

.0005

Percents

100

Percent is out of what number

100

200

55/100 is what percent

55%

300

30/100 finished the test.  What percent finished

30%

400

10/100 kids like spinach, what percent does not like spinach?

90%

500

37/100 people have a pool, what percent does not have a pool?

63%

Setting up Proportions

100

How many equal fractions make up a proportion?

2

200

10% of the kids went swimming.  There were 1000 kids.  How many went swimming?

10/100=x/1000

300

76% of the students like Science.  There are 30 students.  How many like Science?

76/100=x/30

400

There are 50 rides at the amusement park.  95% of the rides work.  How many rides don't work?

5/100=x/50

500

There are 12 lights in the classroom.  17% of the lights are broken.  How many lights work?

83/100=x/12

Solving Proportions

100

10/100=x/20

x=2

200

25/100=w/20

w=5

300

99/100=d/100

99

400

45/100=s/15

x=6.75

500

8/100=x/600

x=48