Add 40/21 and 12/70
1st number: 1 19/21, 2nd number: 12/70
40/21 + 12/70 is 218/105.
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,
40/21 = 40 × 10/21 × 10 = 400/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Add the two like fractions:
400/210 + 36/210 = 400 + 36/210 = 436/210 - 436/210 simplified gives 218/105
- So, 40/21 + 12/70 = 218/105
In mixed form: 28/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+12/70 40/21+24/70 40/42+12/70 40/21+36/70 40/63+12/70 40/21+60/70 40/21+84/70