Subtract 20/42 from 75/8
1st number: 9 3/8, 2nd number: 20/42
75/8 - 20/42 is 1495/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
75/8 = 75 × 21/8 × 21 = 1575/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
20/42 = 20 × 4/42 × 4 = 80/168 - Subtract the two like fractions:
1575/168 - 80/168 = 1575 - 80/168 = 1495/168 - In mixed form: 8151/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/8-40/42 75/16-20/42 75/8-20/84 75/8-60/42 75/24-20/42 75/40-20/42 75/56-20/42