Add 42/49 and 3/81
42/49 + 3/81 is 169/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 81 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,
42/49 = 42 × 81/49 × 81 = 3402/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
3/81 = 3 × 49/81 × 49 = 147/3969 - Add the two like fractions:
3402/3969 + 147/3969 = 3402 + 147/3969 = 3549/3969 - 3549/3969 simplified gives 169/189
- So, 42/49 + 3/81 = 169/189
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