Add 21/14 and 42/60
1st number: 1 7/14, 2nd number: 42/60
21/14 + 42/60 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 14 × 30 = 420,
21/14 = 21 × 30/14 × 30 = 630/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
42/60 = 42 × 7/60 × 7 = 294/420 - Add the two like fractions:
630/420 + 294/420 = 630 + 294/420 = 924/420 - 924/420 simplified gives 11/5
- So, 21/14 + 42/60 = 11/5
In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+42/60 21/14+84/60 21/28+42/60 63/14+42/60 21/42+42/60 21/70+42/60 21/98+42/60