Add 12/21 and 8/35
12/21 + 8/35 is 4/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
12/21 = 12 × 5/21 × 5 = 60/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
8/35 = 8 × 3/35 × 3 = 24/105 - Add the two like fractions:
60/105 + 24/105 = 60 + 24/105 = 84/105 - 84/105 simplified gives 4/5
- So, 12/21 + 8/35 = 4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+8/35 12/21+16/35 12/42+8/35 12/21+8/70 36/21+8/35 12/21+24/35 12/63+8/35 60/21+8/35 12/21+40/35 84/21+8/35 12/21+56/35