Subtract 15/8 from 45/75
1st number: 45/75, 2nd number: 1 7/8
45/75 - 15/8 is -51/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 8 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
45/75 = 45 × 8/75 × 8 = 360/600 - Likewise, for the 2nd fraction, since 8 × 75 = 600,
15/8 = 15 × 75/8 × 75 = 1125/600 - Subtract the two like fractions:
360/600 - 1125/600 = 360 - 1125/600 = -765/600 - After reducing the fraction, the answer is -51/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/75-15/8 45/75-30/8 45/75-15/16 45/75-45/8 45/75-15/24 45/75-75/8 45/75-15/40 45/75-15/56