Add 20/72 and 5/7
20/72 + 5/7 is 125/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 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 7 × 72 = 504,
5/7 = 5 × 72/7 × 72 = 360/504 - Add the two like fractions:
140/504 + 360/504 = 140 + 360/504 = 500/504 - 500/504 simplified gives 125/126
- So, 20/72 + 5/7 = 125/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72+5/7 20/72+10/7 20/72+5/14 60/72+5/7 20/72+15/7 20/72+5/21 20/72+25/7 20/72+5/35 20/72+35/7 20/72+5/49