Subtract 35/8 from 45/21
1st number: 2 3/21, 2nd number: 4 3/8
45/21 - 35/8 is -125/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
45/21 = 45 × 8/21 × 8 = 360/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
35/8 = 35 × 21/8 × 21 = 735/168 - Subtract the two like fractions:
360/168 - 735/168 = 360 - 735/168 = -375/168 - After reducing the fraction, the answer is -125/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-35/8 45/21-70/8 45/42-35/8 45/21-35/16 45/63-35/8 45/21-35/24 45/21-35/40 45/21-35/56