Add 84/63 and 3/72
1st number: 1 21/63, 2nd number: 3/72
84/63 + 3/72 is 11/8.
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,
84/63 = 84 × 8/63 × 8 = 672/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
3/72 = 3 × 7/72 × 7 = 21/504 - Add the two like fractions:
672/504 + 21/504 = 672 + 21/504 = 693/504 - 693/504 simplified gives 11/8
- So, 84/63 + 3/72 = 11/8
In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+6/72 84/63+9/72 84/63+15/72 84/63+21/72