Add 21/2 and 18/60
1st number: 10 1/2, 2nd number: 18/60
21/2 + 18/60 is 54/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 2 × 30 = 60,
21/2 = 21 × 30/2 × 30 = 630/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
18/60 = 18 × 1/60 × 1 = 18/60 - Add the two like fractions:
630/60 + 18/60 = 630 + 18/60 = 648/60 - 648/60 simplified gives 54/5
- So, 21/2 + 18/60 = 54/5
In mixed form: 104/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+18/60 21/2+36/60 21/4+18/60 63/2+18/60 21/2+54/60 21/6+18/60 21/2+90/60 21/10+18/60 21/14+18/60