Add 1/30 and 12/21
1/30 + 12/21 is 127/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
12/21 = 12 × 10/21 × 10 = 120/210 - Add the two like fractions:
7/210 + 120/210 = 7 + 120/210 = 127/210 - So, 1/30 + 12/21 = 127/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30+12/21 1/30+24/21 1/60+12/21 1/30+12/42 3/30+12/21 1/30+36/21 1/90+12/21 1/30+12/63 5/30+12/21 1/30+60/21 7/30+12/21 1/30+84/21