Add 18/4 and 81/60
1st number: 4 2/4, 2nd number: 1 21/60
18/4 + 81/60 is 117/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
18/4 = 18 × 15/4 × 15 = 270/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
81/60 = 81 × 1/60 × 1 = 81/60 - Add the two like fractions:
270/60 + 81/60 = 270 + 81/60 = 351/60 - 351/60 simplified gives 117/20
- So, 18/4 + 81/60 = 117/20
In mixed form: 517/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4+81/60 18/8+81/60 54/4+81/60 18/12+81/60 90/4+81/60 18/20+81/60 18/28+81/60