Add 63/27 and 4/21
1st number: 2 9/27, 2nd number: 4/21
63/27 + 4/21 is 53/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
63/27 = 63 × 7/27 × 7 = 441/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
4/21 = 4 × 9/21 × 9 = 36/189 - Add the two like fractions:
441/189 + 36/189 = 441 + 36/189 = 477/189 - 477/189 simplified gives 53/21
- So, 63/27 + 4/21 = 53/21
In mixed form: 211/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/27+8/21 63/54+4/21 63/27+4/42 63/27+12/21 63/81+4/21 63/27+4/63 63/27+20/21 63/27+28/21