Add 12/63 and 81/72
1st number: 12/63, 2nd number: 1 9/72
12/63 + 81/72 is 221/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
12/63 = 12 × 8/63 × 8 = 96/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
81/72 = 81 × 7/72 × 7 = 567/504 - Add the two like fractions:
96/504 + 567/504 = 96 + 567/504 = 663/504 - 663/504 simplified gives 221/168
- So, 12/63 + 81/72 = 221/168
In mixed form: 153/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63+81/72 36/63+81/72 60/63+81/72 84/63+81/72