Percentages• Percent comes from ‘per’ ‘cent’ which means ‘every’

‘hundred’.Therefore: 20% means 20 out of every hundred. That is 20 ÷ 10020% = = 20 ÷ 100 = 0·2

• To change from percentages to fractions we…Write the value over 100 (divide by 100)

• To change from percentages to decimals we…Divide by 100

• To change from decimals to percentages we …Multiply by 100

Fractions

• ½ simply means something split in two.• ¾ simply means 3 split into four parts

Therefore:½ is the same as 1 ÷ 2 and ¾ is the same as 3 ÷ 4½ = 1 ÷ 2 = 0· 5 and ¾ = 3 ÷ 4 = 0· 75

• To change from fractions to decimals we …Divide top number (numerator) by the bottom number (denominator)

Converting between decimals, fractions and percentages