Add 12/21 and 10/60
12/21 + 10/60 is 31/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
12/21 = 12 × 20/21 × 20 = 240/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
10/60 = 10 × 7/60 × 7 = 70/420 - Add the two like fractions:
240/420 + 70/420 = 240 + 70/420 = 310/420 - 310/420 simplified gives 31/42
- So, 12/21 + 10/60 = 31/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+10/60 12/21+20/60 12/42+10/60 36/21+10/60 12/21+30/60 12/63+10/60 60/21+10/60 12/21+50/60 84/21+10/60 12/21+70/60