Add 72/7 and 72/18
1st number: 10 2/7, 2nd number: 4 0/18
72/7 + 72/18 is 100/7.
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,
72/7 = 72 × 18/7 × 18 = 1296/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
72/18 = 72 × 7/18 × 7 = 504/126 - Add the two like fractions:
1296/126 + 504/126 = 1296 + 504/126 = 1800/126 - 1800/126 simplified gives 100/7
- So, 72/7 + 72/18 = 100/7
In mixed form: 142/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/14+72/18 72/7+72/36 72/21+72/18 72/7+72/54 72/35+72/18 72/7+72/90 72/49+72/18