Imagine a packet of 500 liquorice allsorts. Red, blue and orange in a ratio of 2 : 3 : 5. How many of each colour was there ?

If I ate 15 of the 45 red allsorts, how many were left ?

If I ate one third, how many were left ? If I ate 25 % of the allsorts, how many is that ?

If I ate 0.2 of the 500 allsorts, how many were left ?

Answers : 1. 500 / (2 + 3 + 5 = 10) = 50, therefore 100 : 150 : 250

2. 45- 15 = 303. 500 – (500 / 3 = 166.66 r) = 334

4. 500 / 4 = 125 5. 500 – (500 / 10 x 2 = 100) = 400© Jacqueline Richards 2007

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