Subtract 45/8 from 21/3
1st number: 7 0/3, 2nd number: 5 5/8
21/3 - 45/8 is 11/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 3 × 8 = 24,
21/3 = 21 × 8/3 × 8 = 168/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
45/8 = 45 × 3/8 × 3 = 135/24 - Subtract the two like fractions:
168/24 - 135/24 = 168 - 135/24 = 33/24 - After reducing the fraction, the answer is 11/8
- In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3-45/8 21/3-90/8 21/6-45/8 21/3-45/16 63/3-45/8 21/9-45/8 21/3-45/24 21/15-45/8 21/3-45/40 21/3-45/56