Add 42/63 and 81/18
1st number: 42/63, 2nd number: 4 9/18
42/63 + 81/18 is 31/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
42/63 = 42 × 2/63 × 2 = 84/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
81/18 = 81 × 7/18 × 7 = 567/126 - Add the two like fractions:
84/126 + 567/126 = 84 + 567/126 = 651/126 - 651/126 simplified gives 31/6
- So, 42/63 + 81/18 = 31/6
In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+81/18 42/63+81/36 42/63+81/54 42/63+81/90