Add 81/72 and 10/40
1st number: 1 9/72, 2nd number: 10/40
81/72 + 10/40 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
81/72 = 81 × 5/72 × 5 = 405/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
10/40 = 10 × 9/40 × 9 = 90/360 - Add the two like fractions:
405/360 + 90/360 = 405 + 90/360 = 495/360 - 495/360 simplified gives 11/8
- So, 81/72 + 10/40 = 11/8
In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/72+20/40 81/72+10/80 81/72+30/40 81/72+50/40 81/72+70/40