Subtract 54/4 from 21/40
1st number: 21/40, 2nd number: 13 2/4
21/40 - 54/4 is -519/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 4 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Likewise, for the 2nd fraction, since 4 × 10 = 40,
54/4 = 54 × 10/4 × 10 = 540/40 - Subtract the two like fractions:
21/40 - 540/40 = 21 - 540/40 = -519/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40-54/4 21/80-54/4 21/40-54/8 63/40-54/4 21/40-54/12 21/40-54/20 21/40-54/28