Subtract 7/45 from 9/42
9/42 - 7/45 is 37/630.
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,
9/42 = 9 × 15/42 × 15 = 135/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
7/45 = 7 × 14/45 × 14 = 98/630 - Subtract the two like fractions:
135/630 - 98/630 = 135 - 98/630 = 37/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-7/45 9/42-14/45 9/84-7/45 9/42-7/90 27/42-7/45 9/42-21/45 45/42-7/45 9/42-35/45 63/42-7/45 9/42-49/45