Subtract 63/18 from 21/75
1st number: 21/75, 2nd number: 3 9/18
21/75 - 63/18 is -161/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
21/75 = 21 × 6/75 × 6 = 126/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
63/18 = 63 × 25/18 × 25 = 1575/450 - Subtract the two like fractions:
126/450 - 1575/450 = 126 - 1575/450 = -1449/450 - After reducing the fraction, the answer is -161/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75-63/18 21/75-63/36 63/75-63/18 21/75-63/54 21/75-63/90