Subtract 40/42 from 25/8
1st number: 3 1/8, 2nd number: 40/42
25/8 - 40/42 is 365/168.
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,
25/8 = 25 × 21/8 × 21 = 525/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
40/42 = 40 × 4/42 × 4 = 160/168 - Subtract the two like fractions:
525/168 - 160/168 = 525 - 160/168 = 365/168 - In mixed form: 229/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/8-40/42 25/8-80/42 25/16-40/42 25/8-40/84 75/8-40/42 25/24-40/42 25/40-40/42 25/56-40/42