Subtract 8/42 from 20/8
1st number: 2 4/8, 2nd number: 8/42
20/8 - 8/42 is 97/42.
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,
20/8 = 20 × 21/8 × 21 = 420/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
8/42 = 8 × 4/42 × 4 = 32/168 - Subtract the two like fractions:
420/168 - 32/168 = 420 - 32/168 = 388/168 - After reducing the fraction, the answer is 97/42
- In mixed form: 213/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-8/42 20/8-16/42 20/16-8/42 20/8-8/84 60/8-8/42 20/8-24/42 20/24-8/42 20/8-40/42 20/40-8/42 20/8-56/42 20/56-8/42