Subtract 75/40 from 6/21
1st number: 6/21, 2nd number: 1 35/40
6/21 - 75/40 is -89/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
6/21 = 6 × 40/21 × 40 = 240/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
75/40 = 75 × 21/40 × 21 = 1575/840 - Subtract the two like fractions:
240/840 - 1575/840 = 240 - 1575/840 = -1335/840 - After reducing the fraction, the answer is -89/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-75/40 6/42-75/40 6/21-75/80 18/21-75/40 6/63-75/40 30/21-75/40 42/21-75/40