Subtract 54/20 from 21/25
1st number: 21/25, 2nd number: 2 14/20
21/25 - 54/20 is -93/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 25 × 4 = 100,
21/25 = 21 × 4/25 × 4 = 84/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
54/20 = 54 × 5/20 × 5 = 270/100 - Subtract the two like fractions:
84/100 - 270/100 = 84 - 270/100 = -186/100 - After reducing the fraction, the answer is -93/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-54/20 21/50-54/20 21/25-54/40 63/25-54/20 21/75-54/20 21/25-54/60