Add 60/70 and 12/21
60/70 + 12/21 is 10/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
60/70 = 60 × 3/70 × 3 = 180/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
12/21 = 12 × 10/21 × 10 = 120/210 - Add the two like fractions:
180/210 + 120/210 = 180 + 120/210 = 300/210 - 300/210 simplified gives 10/7
- So, 60/70 + 12/21 = 10/7
In mixed form: 13/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+24/21 60/70+12/42 60/70+36/21 60/70+12/63 60/70+60/21 60/70+84/21