Add 30/7 and 20/40
1st number: 4 2/7, 2nd number: 20/40
30/7 + 20/40 is 67/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
30/7 = 30 × 40/7 × 40 = 1200/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
20/40 = 20 × 7/40 × 7 = 140/280 - Add the two like fractions:
1200/280 + 140/280 = 1200 + 140/280 = 1340/280 - 1340/280 simplified gives 67/14
- So, 30/7 + 20/40 = 67/14
In mixed form: 411/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7+20/40 30/14+20/40 30/7+20/80 90/7+20/40 30/7+60/40 30/21+20/40 30/35+20/40 30/49+20/40