Add 81/63 and 18/27
1st number: 1 18/63, 2nd number: 18/27
81/63 + 18/27 is 41/21.
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,
81/63 = 81 × 3/63 × 3 = 243/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
18/27 = 18 × 7/27 × 7 = 126/189 - Add the two like fractions:
243/189 + 126/189 = 243 + 126/189 = 369/189 - 369/189 simplified gives 41/21
- So, 81/63 + 18/27 = 41/21
In mixed form: 120/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/63+36/27 81/63+18/54 81/63+54/27 81/63+18/81 81/63+90/27