Add 42/72 and 56/63
42/72 + 56/63 is 53/36.
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,
42/72 = 42 × 7/72 × 7 = 294/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
56/63 = 56 × 8/63 × 8 = 448/504 - Add the two like fractions:
294/504 + 448/504 = 294 + 448/504 = 742/504 - 742/504 simplified gives 53/36
- So, 42/72 + 56/63 = 53/36
In mixed form: 117/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72+56/63