Add 12/35 and 12/21
12/35 + 12/21 is 32/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
12/35 = 12 × 3/35 × 3 = 36/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
12/21 = 12 × 5/21 × 5 = 60/105 - Add the two like fractions:
36/105 + 60/105 = 36 + 60/105 = 96/105 - 96/105 simplified gives 32/35
- So, 12/35 + 12/21 = 32/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/35+12/21 12/35+24/21 12/70+12/21 12/35+12/42 36/35+12/21 12/35+36/21 12/35+12/63 60/35+12/21 12/35+60/21 84/35+12/21 12/35+84/21