Add 7/20 and 30/70
7/20 + 30/70 is 109/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
7/20 = 7 × 7/20 × 7 = 49/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
30/70 = 30 × 2/70 × 2 = 60/140 - Add the two like fractions:
49/140 + 60/140 = 49 + 60/140 = 109/140 - So, 7/20 + 30/70 = 109/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20+30/70 7/20+60/70 7/40+30/70 21/20+30/70 7/20+90/70 7/60+30/70 35/20+30/70 49/20+30/70