Add 12/21 and 24/70
12/21 + 24/70 is 32/35.
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,
24/70 = 24 × 3/70 × 3 = 72/210 - Add the two like fractions:
120/210 + 72/210 = 120 + 72/210 = 192/210 - 192/210 simplified gives 32/35
- So, 12/21 + 24/70 = 32/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+24/70 12/21+48/70 12/42+24/70 36/21+24/70 12/21+72/70 12/63+24/70 60/21+24/70 84/21+24/70