Add 81/15 and 40/45
1st number: 5 6/15, 2nd number: 40/45
81/15 + 40/45 is 283/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
81/15 = 81 × 3/15 × 3 = 243/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
40/45 = 40 × 1/45 × 1 = 40/45 - Add the two like fractions:
243/45 + 40/45 = 243 + 40/45 = 283/45 - So, 81/15 + 40/45 = 283/45
In mixed form: 613/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/15+80/45 81/30+40/45 81/15+40/90 81/45+40/45 81/75+40/45