Subtract 45/25 from 3/42
1st number: 3/42, 2nd number: 1 20/25
3/42 - 45/25 is -121/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 25 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
3/42 = 3 × 25/42 × 25 = 75/1050 - Likewise, for the 2nd fraction, since 25 × 42 = 1050,
45/25 = 45 × 42/25 × 42 = 1890/1050 - Subtract the two like fractions:
75/1050 - 1890/1050 = 75 - 1890/1050 = -1815/1050 - After reducing the fraction, the answer is -121/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42-45/25 3/42-90/25 3/84-45/25 3/42-45/50 9/42-45/25 3/42-45/75 15/42-45/25 21/42-45/25