Subtract 9/35 from 7/90
7/90 - 9/35 is -113/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 35 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Likewise, for the 2nd fraction, since 35 × 18 = 630,
9/35 = 9 × 18/35 × 18 = 162/630 - Subtract the two like fractions:
49/630 - 162/630 = 49 - 162/630 = -113/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-9/35 7/90-18/35 7/90-9/70 21/90-9/35 7/90-27/35 35/90-9/35 7/90-45/35 49/90-9/35 7/90-63/35