Add 72/40 and 45/56
1st number: 1 32/40, 2nd number: 45/56
72/40 + 45/56 is 729/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
72/40 = 72 × 7/40 × 7 = 504/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
45/56 = 45 × 5/56 × 5 = 225/280 - Add the two like fractions:
504/280 + 225/280 = 504 + 225/280 = 729/280 - So, 72/40 + 45/56 = 729/280
In mixed form: 2169/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+90/56 72/80+45/56