Add 81/45 and 15/7
1st number: 1 36/45, 2nd number: 2 1/7
81/45 + 15/7 is 138/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
81/45 = 81 × 7/45 × 7 = 567/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
15/7 = 15 × 45/7 × 45 = 675/315 - Add the two like fractions:
567/315 + 675/315 = 567 + 675/315 = 1242/315 - 1242/315 simplified gives 138/35
- So, 81/45 + 15/7 = 138/35
In mixed form: 333/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/45+30/7 81/90+15/7 81/45+15/14 81/45+45/7 81/45+15/21 81/45+75/7 81/45+15/35 81/45+15/49