Add 21/20 and 2/15
1st number: 1 1/20, 2nd number: 2/15
21/20 + 2/15 is 71/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
21/20 = 21 × 3/20 × 3 = 63/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
2/15 = 2 × 4/15 × 4 = 8/60 - Add the two like fractions:
63/60 + 8/60 = 63 + 8/60 = 71/60 - So, 21/20 + 2/15 = 71/60
In mixed form: 111/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+2/15 21/20+4/15 21/40+2/15 21/20+2/30 63/20+2/15 21/20+6/15 21/60+2/15 21/20+2/45 21/20+10/15 21/20+2/75 21/20+14/15