Add 81/18 and 12/63
1st number: 4 9/18, 2nd number: 12/63
81/18 + 12/63 is 197/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
81/18 = 81 × 7/18 × 7 = 567/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
12/63 = 12 × 2/63 × 2 = 24/126 - Add the two like fractions:
567/126 + 24/126 = 567 + 24/126 = 591/126 - 591/126 simplified gives 197/42
- So, 81/18 + 12/63 = 197/42
In mixed form: 429/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18+24/63 81/36+12/63 81/18+36/63 81/54+12/63 81/18+60/63 81/90+12/63 81/18+84/63