Add 54/7 and 72/18
1st number: 7 5/7, 2nd number: 4 0/18
54/7 + 72/18 is 82/7.
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,
54/7 = 54 × 18/7 × 18 = 972/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
72/18 = 72 × 7/18 × 7 = 504/126 - Add the two like fractions:
972/126 + 504/126 = 972 + 504/126 = 1476/126 - 1476/126 simplified gives 82/7
- So, 54/7 + 72/18 = 82/7
In mixed form: 115/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/14+72/18 54/7+72/36 54/21+72/18 54/7+72/54 54/35+72/18 54/7+72/90 54/49+72/18