Subtract 9/42 from 45/75
45/75 - 9/42 is 27/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 75 × 14 = 1050,
45/75 = 45 × 14/75 × 14 = 630/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
9/42 = 9 × 25/42 × 25 = 225/1050 - Subtract the two like fractions:
630/1050 - 225/1050 = 630 - 225/1050 = 405/1050 - After reducing the fraction, the answer is 27/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/75-9/42 45/75-18/42 45/75-9/84 45/75-27/42 45/75-45/42 45/75-63/42