Add 12/10 and 30/21
1st number: 1 2/10, 2nd number: 1 9/21
12/10 + 30/21 is 92/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
12/10 = 12 × 21/10 × 21 = 252/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
30/21 = 30 × 10/21 × 10 = 300/210 - Add the two like fractions:
252/210 + 300/210 = 252 + 300/210 = 552/210 - 552/210 simplified gives 92/35
- So, 12/10 + 30/21 = 92/35
In mixed form: 222/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/10+30/21 12/10+60/21 12/20+30/21 12/10+30/42 36/10+30/21 12/10+90/21 12/30+30/21 12/10+30/63 60/10+30/21 12/50+30/21 84/10+30/21 12/70+30/21