Add 20/63 and 50/72
20/63 + 50/72 is 85/84.
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,
20/63 = 20 × 8/63 × 8 = 160/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
50/72 = 50 × 7/72 × 7 = 350/504 - Add the two like fractions:
160/504 + 350/504 = 160 + 350/504 = 510/504 - 510/504 simplified gives 85/84
- So, 20/63 + 50/72 = 85/84
In mixed form: 11/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63+50/72 60/63+50/72