Add 50/21 and 20/72
1st number: 2 8/21, 2nd number: 20/72
50/21 + 20/72 is 335/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
50/21 = 50 × 24/21 × 24 = 1200/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Add the two like fractions:
1200/504 + 140/504 = 1200 + 140/504 = 1340/504 - 1340/504 simplified gives 335/126
- So, 50/21 + 20/72 = 335/126
In mixed form: 283/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+40/72 50/42+20/72 50/21+60/72 50/63+20/72