Subtract 9/45 from 6/42
6/42 - 9/45 is -2/35.
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,
6/42 = 6 × 15/42 × 15 = 90/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
9/45 = 9 × 14/45 × 14 = 126/630 - Subtract the two like fractions:
90/630 - 126/630 = 90 - 126/630 = -36/630 - After reducing the fraction, the answer is -2/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-9/45 6/42-18/45 6/84-9/45 6/42-9/90 18/42-9/45 6/42-27/45 30/42-9/45 6/42-63/45