Add 8/54 and 30/21
1st number: 8/54, 2nd number: 1 9/21
8/54 + 30/21 is 298/189.
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,
8/54 = 8 × 7/54 × 7 = 56/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
30/21 = 30 × 18/21 × 18 = 540/378 - Add the two like fractions:
56/378 + 540/378 = 56 + 540/378 = 596/378 - 596/378 simplified gives 298/189
- So, 8/54 + 30/21 = 298/189
In mixed form: 1109/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/54+30/21 8/54+60/21 8/54+30/42 24/54+30/21 8/54+90/21 8/54+30/63 40/54+30/21 56/54+30/21