Add 45/54 and 32/21
1st number: 45/54, 2nd number: 1 11/21
45/54 + 32/21 is 33/14.
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,
45/54 = 45 × 7/54 × 7 = 315/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
32/21 = 32 × 18/21 × 18 = 576/378 - Add the two like fractions:
315/378 + 576/378 = 315 + 576/378 = 891/378 - 891/378 simplified gives 33/14
- So, 45/54 + 32/21 = 33/14
In mixed form: 25/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/54+32/21 45/54+64/21 45/54+32/42 45/54+96/21 45/54+32/63