Subtract 63/45 from 42/75
1st number: 42/75, 2nd number: 1 18/45
42/75 - 63/45 is -21/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 75 × 3 = 225,
42/75 = 42 × 3/75 × 3 = 126/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
63/45 = 63 × 5/45 × 5 = 315/225 - Subtract the two like fractions:
126/225 - 315/225 = 126 - 315/225 = -189/225 - After reducing the fraction, the answer is -21/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/75-63/45 42/75-63/90