Fractions and percentages
Calculating with percentages
1 These are some common fraction-percentage equivalents you should learn by heart.
2 We can use the fractional equivalents of percentages to calculate quantities. (a) Find 75% of 40 kg. Recall 75% = 3 __ 4 75% of 40kg = 3 __ 4 of 40kg
40
10
10
10
10
1 __ 4
of 40 = 10
3 __ 4 of40=10×3 = 30 75% of 40kg = 30kg
65
9781380050717__text.indb 65
28/04/2022 12:11
Made with FlippingBook Learn more on our blog