Subtract 9/7 from 42/75
1st number: 42/75, 2nd number: 1 2/7
42/75 - 9/7 is -127/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 7 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
42/75 = 42 × 7/75 × 7 = 294/525 - Likewise, for the 2nd fraction, since 7 × 75 = 525,
9/7 = 9 × 75/7 × 75 = 675/525 - Subtract the two like fractions:
294/525 - 675/525 = 294 - 675/525 = -381/525 - After reducing the fraction, the answer is -127/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/75-9/7 42/75-18/7 42/75-9/14 42/75-27/7 42/75-9/21 42/75-45/7 42/75-9/35 42/75-63/7 42/75-9/49