Page 120 - Cambridge Checkpoint Mathematics Coursebook 7_Slide

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1 a Copy this diagram and shade 60% of it.

b Shade half of the unshaded part in a different way. What percentage of the whole shape is this?

2 Write each of these percentages as a fraction in its simplest possible form.
a 30% b 60% c 90% d 15% e 28%
3 Write these fractions as percentages.
a 3 b 3 c 3 d 3 e 3 f 3
100 50 25 20 10 5

4 a What fraction of 40 kg is 16 kg? b Write your answer to part a as a percentage.
5 A student had $40 but spent $32. What percentage of his money has he spent?

6 Find 40% of:
a 20 kg b 35 m c 250 ml d 55 people e 75 hours

7 Find these quantities.
a 18% of 50 b 64% of 25 c 65% of 80 d 37% of 200
8 Maya has saved $75. This is 30% of what she needs. Explain how you can work out
how much she needs.
9 Describe two different ways to calculate 60% of $35.

10 Ma’s Mango Chutney is sold in 250 g jars. Each jar contains
135 g of mangoes.
Pa’s Mango Chutney is sold in 400 g jars. Each jar contains
248 g of mangoes.
Which brand has the greater percentage of mangoes?

11 In class A, 17 students in a class of 25 passed an exam. In class B,
13 out of 20 passed. In class C, 7 out of 10 passed. Compare the percentage
pass rate for each class.

118 11 Percentages