Add 21/7 and 12/60
1st number: 3 0/7, 2nd number: 12/60
21/7 + 12/60 is 16/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 7 × 60 = 420,
21/7 = 21 × 60/7 × 60 = 1260/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
12/60 = 12 × 7/60 × 7 = 84/420 - Add the two like fractions:
1260/420 + 84/420 = 1260 + 84/420 = 1344/420 - 1344/420 simplified gives 16/5
- So, 21/7 + 12/60 = 16/5
In mixed form: 31/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+12/60 21/7+24/60 21/14+12/60 63/7+12/60 21/7+36/60 21/35+12/60 21/7+84/60 21/49+12/60