Add 8/21 and 12/70
8/21 + 12/70 is 58/105.
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,
8/21 = 8 × 10/21 × 10 = 80/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Add the two like fractions:
80/210 + 36/210 = 80 + 36/210 = 116/210 - 116/210 simplified gives 58/105
- So, 8/21 + 12/70 = 58/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+12/70 8/21+24/70 8/42+12/70 24/21+12/70 8/21+36/70 8/63+12/70 40/21+12/70 8/21+60/70 56/21+12/70 8/21+84/70