Add 21/35 and 2/12
21/35 + 2/12 is 23/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 35 × 12 = 420,
21/35 = 21 × 12/35 × 12 = 252/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
2/12 = 2 × 35/12 × 35 = 70/420 - Add the two like fractions:
252/420 + 70/420 = 252 + 70/420 = 322/420 - 322/420 simplified gives 23/30
- So, 21/35 + 2/12 = 23/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35+2/12 21/35+4/12 21/70+2/12 21/35+2/24 63/35+2/12 21/35+6/12 21/35+2/36 21/35+10/12 21/35+2/60 21/35+14/12 21/35+2/84