Add 81/72 and 42/63
1st number: 1 9/72, 2nd number: 42/63
81/72 + 42/63 is 43/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
81/72 = 81 × 7/72 × 7 = 567/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
42/63 = 42 × 8/63 × 8 = 336/504 - Add the two like fractions:
567/504 + 336/504 = 567 + 336/504 = 903/504 - 903/504 simplified gives 43/24
- So, 81/72 + 42/63 = 43/24
In mixed form: 119/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/72+84/63