Add 42/63 and 18/27
42/63 + 18/27 is 4/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 63 × 3 = 189,
42/63 = 42 × 3/63 × 3 = 126/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
18/27 = 18 × 7/27 × 7 = 126/189 - Add the two like fractions:
126/189 + 126/189 = 126 + 126/189 = 252/189 - 252/189 simplified gives 4/3
- So, 42/63 + 18/27 = 4/3
In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+18/27 42/63+36/27 42/63+18/54 42/63+54/27 42/63+18/81 42/63+90/27