Subtract 75/4 from 20/84
1st number: 20/84, 2nd number: 18 3/4
20/84 - 75/4 is -1555/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
75/4 = 75 × 21/4 × 21 = 1575/84 - Subtract the two like fractions:
20/84 - 1575/84 = 20 - 1575/84 = -1555/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84-75/4 20/84-75/8 60/84-75/4 20/84-75/12 20/84-75/20 20/84-75/28