Subtract 16/45 from 54/21
1st number: 2 12/21, 2nd number: 16/45
54/21 - 16/45 is 698/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
54/21 = 54 × 15/21 × 15 = 810/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
16/45 = 16 × 7/45 × 7 = 112/315 - Subtract the two like fractions:
810/315 - 112/315 = 810 - 112/315 = 698/315 - In mixed form: 268/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21-32/45 54/42-16/45 54/21-16/90 54/21-48/45 54/63-16/45 54/21-80/45