Add 63/56 and 30/40
1st number: 1 7/56, 2nd number: 30/40
63/56 + 30/40 is 15/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
63/56 = 63 × 5/56 × 5 = 315/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
30/40 = 30 × 7/40 × 7 = 210/280 - Add the two like fractions:
315/280 + 210/280 = 315 + 210/280 = 525/280 - 525/280 simplified gives 15/8
- So, 63/56 + 30/40 = 15/8
In mixed form: 17/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/56+60/40 63/56+30/80 63/56+90/40