Add 49/40 and 20/70
1st number: 1 9/40, 2nd number: 20/70
49/40 + 20/70 is 423/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
49/40 = 49 × 7/40 × 7 = 343/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
20/70 = 20 × 4/70 × 4 = 80/280 - Add the two like fractions:
343/280 + 80/280 = 343 + 80/280 = 423/280 - So, 49/40 + 20/70 = 423/280
In mixed form: 1143/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/40+20/70 49/40+40/70 49/80+20/70 49/40+60/70