Add 18/7 and 81/60
1st number: 2 4/7, 2nd number: 1 21/60
18/7 + 81/60 is 549/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 7 × 60 = 420,
18/7 = 18 × 60/7 × 60 = 1080/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
81/60 = 81 × 7/60 × 7 = 567/420 - Add the two like fractions:
1080/420 + 567/420 = 1080 + 567/420 = 1647/420 - 1647/420 simplified gives 549/140
- So, 18/7 + 81/60 = 549/140
In mixed form: 3129/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7+81/60 18/14+81/60 54/7+81/60 18/21+81/60 90/7+81/60 18/35+81/60 18/49+81/60