Add 35/54 and 81/21
1st number: 35/54, 2nd number: 3 18/21
35/54 + 81/21 is 1703/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
35/54 = 35 × 7/54 × 7 = 245/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
81/21 = 81 × 18/21 × 18 = 1458/378 - Add the two like fractions:
245/378 + 1458/378 = 245 + 1458/378 = 1703/378 - So, 35/54 + 81/21 = 1703/378
In mixed form: 4191/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/54+81/21 35/54+81/42 35/54+81/63