Add 54/21 and 8/30
1st number: 2 12/21, 2nd number: 8/30
54/21 + 8/30 is 298/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
54/21 = 54 × 10/21 × 10 = 540/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
8/30 = 8 × 7/30 × 7 = 56/210 - Add the two like fractions:
540/210 + 56/210 = 540 + 56/210 = 596/210 - 596/210 simplified gives 298/105
- So, 54/21 + 8/30 = 298/105
In mixed form: 288/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+16/30 54/42+8/30 54/21+8/60 54/21+24/30 54/63+8/30 54/21+8/90 54/21+40/30 54/21+56/30