Add 81/54 and 90/42
1st number: 1 27/54, 2nd number: 2 6/42
81/54 + 90/42 is 51/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
81/54 = 81 × 7/54 × 7 = 567/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
90/42 = 90 × 9/42 × 9 = 810/378 - Add the two like fractions:
567/378 + 810/378 = 567 + 810/378 = 1377/378 - 1377/378 simplified gives 51/14
- So, 81/54 + 90/42 = 51/14
In mixed form: 39/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/54+90/84