Add 12/21 and 4/70
12/21 + 4/70 is 22/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
12/21 = 12 × 10/21 × 10 = 120/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
4/70 = 4 × 3/70 × 3 = 12/210 - Add the two like fractions:
120/210 + 12/210 = 120 + 12/210 = 132/210 - 132/210 simplified gives 22/35
- So, 12/21 + 4/70 = 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+4/70 12/21+8/70 12/42+4/70 36/21+4/70 12/21+12/70 12/63+4/70 60/21+4/70 12/21+20/70 84/21+4/70 12/21+28/70