Add 81/40 and 10/28
1st number: 2 1/40, 2nd number: 10/28
81/40 + 10/28 is 667/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
81/40 = 81 × 7/40 × 7 = 567/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
10/28 = 10 × 10/28 × 10 = 100/280 - Add the two like fractions:
567/280 + 100/280 = 567 + 100/280 = 667/280 - So, 81/40 + 10/28 = 667/280
In mixed form: 2107/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/40+20/28 81/80+10/28 81/40+10/56 81/40+30/28 81/40+10/84 81/40+50/28 81/40+70/28