Add 21/14 and 75/60
1st number: 1 7/14, 2nd number: 1 15/60
21/14 + 75/60 is 11/4.
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,
75/60 = 75 × 7/60 × 7 = 525/420 - Add the two like fractions:
630/420 + 525/420 = 630 + 525/420 = 1155/420 - 1155/420 simplified gives 11/4
- So, 21/14 + 75/60 = 11/4
In mixed form: 23/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+75/60 21/28+75/60 63/14+75/60 21/42+75/60 21/70+75/60 21/98+75/60