Add 63/40 and 30/70
1st number: 1 23/40, 2nd number: 30/70
63/40 + 30/70 is 561/280.
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,
63/40 = 63 × 7/40 × 7 = 441/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
30/70 = 30 × 4/70 × 4 = 120/280 - Add the two like fractions:
441/280 + 120/280 = 441 + 120/280 = 561/280 - So, 63/40 + 30/70 = 561/280
In mixed form: 21/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/40+60/70 63/80+30/70 63/40+90/70