Add 20/7 and 72/18
1st number: 2 6/7, 2nd number: 4 0/18
20/7 + 72/18 is 48/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
20/7 = 20 × 18/7 × 18 = 360/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
72/18 = 72 × 7/18 × 7 = 504/126 - Add the two like fractions:
360/126 + 504/126 = 360 + 504/126 = 864/126 - 864/126 simplified gives 48/7
- So, 20/7 + 72/18 = 48/7
In mixed form: 66/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7+72/18 20/14+72/18 20/7+72/36 60/7+72/18 20/21+72/18 20/7+72/54 20/35+72/18 20/7+72/90 20/49+72/18