Subtract 2/42 from 4/45
4/45 - 2/42 is 13/315.
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,
4/45 = 4 × 14/45 × 14 = 56/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
2/42 = 2 × 15/42 × 15 = 30/630 - Subtract the two like fractions:
56/630 - 30/630 = 56 - 30/630 = 26/630 - After reducing the fraction, the answer is 13/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/45-2/42 4/45-4/42 4/90-2/42 4/45-2/84 12/45-2/42 4/45-6/42 20/45-2/42 4/45-10/42 28/45-2/42 4/45-14/42