Add 81/54 and 12/63
1st number: 1 27/54, 2nd number: 12/63
81/54 + 12/63 is 71/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 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 63 × 6 = 378,
12/63 = 12 × 6/63 × 6 = 72/378 - Add the two like fractions:
567/378 + 72/378 = 567 + 72/378 = 639/378 - 639/378 simplified gives 71/42
- So, 81/54 + 12/63 = 71/42
In mixed form: 129/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/54+24/63 81/54+36/63 81/54+60/63 81/54+84/63