Add 81/40 and 63/9
1st number: 2 1/40, 2nd number: 7 0/9
81/40 + 63/9 is 361/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
81/40 = 81 × 9/40 × 9 = 729/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
63/9 = 63 × 40/9 × 40 = 2520/360 - Add the two like fractions:
729/360 + 2520/360 = 729 + 2520/360 = 3249/360 - 3249/360 simplified gives 361/40
- So, 81/40 + 63/9 = 361/40
In mixed form: 91/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/80+63/9 81/40+63/18 81/40+63/27 81/40+63/45