Add 7/20 and 30/7
1st number: 7/20, 2nd number: 4 2/7
7/20 + 30/7 is 649/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 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 7 × 20 = 140,
30/7 = 30 × 20/7 × 20 = 600/140 - Add the two like fractions:
49/140 + 600/140 = 49 + 600/140 = 649/140 - So, 7/20 + 30/7 = 649/140
In mixed form: 489/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20+30/7 7/20+60/7 7/40+30/7 7/20+30/14 21/20+30/7 7/20+90/7 7/60+30/7 7/20+30/21 35/20+30/7 7/20+30/35 49/20+30/7 7/20+30/49