Subtract 56/42 from 3/45
1st number: 3/45, 2nd number: 1 14/42
3/45 - 56/42 is -19/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
3/45 = 3 × 14/45 × 14 = 42/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
56/42 = 56 × 15/42 × 15 = 840/630 - Subtract the two like fractions:
42/630 - 840/630 = 42 - 840/630 = -798/630 - After reducing the fraction, the answer is -19/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/45-56/42 3/90-56/42 3/45-56/84 9/45-56/42 15/45-56/42 21/45-56/42