Add 15/21 and 2/54
15/21 + 2/54 is 142/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
15/21 = 15 × 18/21 × 18 = 270/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
2/54 = 2 × 7/54 × 7 = 14/378 - Add the two like fractions:
270/378 + 14/378 = 270 + 14/378 = 284/378 - 284/378 simplified gives 142/189
- So, 15/21 + 2/54 = 142/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+2/54 15/21+4/54 15/42+2/54 45/21+2/54 15/21+6/54 15/63+2/54 75/21+2/54 15/21+10/54 15/21+14/54