Add 20/72 and 10/63
20/72 + 10/63 is 55/126.
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,
20/72 = 20 × 7/72 × 7 = 140/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
10/63 = 10 × 8/63 × 8 = 80/504 - Add the two like fractions:
140/504 + 80/504 = 140 + 80/504 = 220/504 - 220/504 simplified gives 55/126
- So, 20/72 + 10/63 = 55/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72+10/63 20/72+20/63 60/72+10/63 20/72+30/63 20/72+50/63 20/72+70/63