Subtract 15/75 from 12/42
12/42 - 15/75 is 3/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 75 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
12/42 = 12 × 25/42 × 25 = 300/1050 - Likewise, for the 2nd fraction, since 75 × 14 = 1050,
15/75 = 15 × 14/75 × 14 = 210/1050 - Subtract the two like fractions:
300/1050 - 210/1050 = 300 - 210/1050 = 90/1050 - After reducing the fraction, the answer is 3/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-15/75 12/42-30/75 12/84-15/75 36/42-15/75 12/42-45/75 60/42-15/75 84/42-15/75