Add 3/21 and 16/54
3/21 + 16/54 is 83/189.
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,
3/21 = 3 × 18/21 × 18 = 54/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
16/54 = 16 × 7/54 × 7 = 112/378 - Add the two like fractions:
54/378 + 112/378 = 54 + 112/378 = 166/378 - 166/378 simplified gives 83/189
- So, 3/21 + 16/54 = 83/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+16/54 3/21+32/54 3/42+16/54 9/21+16/54 3/21+48/54 3/63+16/54 15/21+16/54 3/21+80/54