Fractions to % and % to Fractions
Write this percentage (35 %) as a fraction
35/100
2/5 = ? /100 = ? %
40/100 = 40%
10% of 30
3
Write 25 % as fraction in its simplest form.
25/100 = 1/4
23/ 25 = ? / 100 = ? %
92/100 = 92%
25% of 84
21
Write 20% as fraction in its simplest form.
20/100 = 1/5
Lachlan's class went on school camp. He asked everyone which activity they liked best and made this chart below.
Kayaking - 7/25
Orienteering - 1/5
Rockclimbing - 9/25
Bush walk - 4/25
A. Give the percentage of students liked each activity.
B. Does the percentage add up to 100%? Is this what you would expect? Explain.
A. Kayaking - 28 %
Orienteering - 20 %
Rock climbing - 36 %
Bush walk - 16 %
B. Yes
75% of 16
12
Write 45% as fraction in its simplest form.
45/100 = 9/20
Write the fractions in these sentences as percentages.
a. About 1 in 4 baby cheetahs survive to adulthood in the wild.
b. China expects 9 out of 10 of its pandas in a breeding programme to survive.
c. About 1 in 5 mammals are in danger of becoming extinct.
a. 25%
b. 90%
c. 20%
45% of 160
72
Write 62% as fraction in its simplest form.
62/100 = 31/50
Write these fractions in sentence as percentages.
a. About 7/25 of all reptiles are in danger of extinction
b. Only about 7/50 of all the plants, animals and birds have been discovered
c. About 17/20 of all foods originated in rainforests
d. Rainforests used to cover 7/50 of the earth's crust. Now they only cover 1/20.
e. Less than 1/100 of rainforest plants have been tested for medicinal purposes.
a. 28%
b. 14%
c. 85%
d. 14%, now 5%
e. 1%
5% of 240
31% of 200
95% of 240
12
62
228