Subtract 75/42 from 8/21
1st number: 8/21, 2nd number: 1 33/42
8/21 - 75/42 is -59/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
8/21 = 8 × 2/21 × 2 = 16/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
75/42 = 75 × 1/42 × 1 = 75/42 - Subtract the two like fractions:
16/42 - 75/42 = 16 - 75/42 = -59/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21-75/42 8/42-75/42 8/21-75/84 24/21-75/42 8/63-75/42 40/21-75/42 56/21-75/42