divide it by 5
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bunston doesn't have a fifth power....
Learn at school
You divide the number by 5.
-- To add one fifth to a number, add 0.2 to it. -- To find a new number that is one fifth bigger than the original number, multiply the original number by 1.2 .
£1=100pence. Find one fifth by 100/5. Multiply answer by 2. Two fifths of £1 is therefore 40p.