Subtract 40/45 from 2/42
2/42 - 40/45 is -53/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
2/42 = 2 × 15/42 × 15 = 30/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
40/45 = 40 × 14/45 × 14 = 560/630 - Subtract the two like fractions:
30/630 - 560/630 = 30 - 560/630 = -530/630 - After reducing the fraction, the answer is -53/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42-40/45 2/42-80/45 2/84-40/45 2/42-40/90 6/42-40/45 10/42-40/45 14/42-40/45