Add 10/40 and 81/28
1st number: 10/40, 2nd number: 2 25/28
10/40 + 81/28 is 22/7.
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,
10/40 = 10 × 7/40 × 7 = 70/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
81/28 = 81 × 10/28 × 10 = 810/280 - Add the two like fractions:
70/280 + 810/280 = 70 + 810/280 = 880/280 - 880/280 simplified gives 22/7
- So, 10/40 + 81/28 = 22/7
In mixed form: 31/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+81/28 10/80+81/28 10/40+81/56 30/40+81/28 10/40+81/84 50/40+81/28 70/40+81/28