When adding fractions, the denominators have to be the same before you can add the numerators. Find equivalent fractions for both 1 3 and 1 4 The lowest number which 3 and 4 can both divide into is 12 1 3 × 4 4 = 4 12 and 1 4 × 3 3 = 3 12 We can write this easier like this: 1 3 + 1 4 = 4 + 3 12 = 7 12 ONLY add the numerators Answer link