Percent: part, whole and percent
Answers are for parents and teachers.
1
Write 7/20 as a decimal and as a percent.
7/20 = 35/100 = 0.35 = 35%.
2
A box has 40 pencils and 15% are red. How many are red?
10% is 4 and 5% is 2, so 15% is 6 red pencils.
3
Hana scored 21 out of 25 in a test. What is her percent?
21/25 = 84/100 = 84%.
4
14 is 5% of a number. Find the number.
5% is 14, so 100% is 20 × 14 = 280.
5
Omar says 60 is 20% of 12. Draw a tape or explain why he is wrong, and write the correct sentence.
The whole must be bigger than the part. 20% of 60 is 12, so the correct sentence is “12 is 20% of 60”.