Add 18/60 and 21/4
1st number: 18/60, 2nd number: 5 1/4
18/60 + 21/4 is 111/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
18/60 = 18 × 1/60 × 1 = 18/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
21/4 = 21 × 15/4 × 15 = 315/60 - Add the two like fractions:
18/60 + 315/60 = 18 + 315/60 = 333/60 - 333/60 simplified gives 111/20
- So, 18/60 + 21/4 = 111/20
In mixed form: 511/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/60+21/4 18/60+42/4 18/60+21/8 54/60+21/4 18/60+63/4 18/60+21/12 90/60+21/4 18/60+21/20 18/60+21/28