Subtract 12/14 from 7/90
7/90 - 12/14 is -491/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 14 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 14 × 45 = 630,
12/14 = 12 × 45/14 × 45 = 540/630 - Subtract the two like fractions:
49/630 - 540/630 = 49 - 540/630 = -491/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-12/14 7/90-24/14 7/90-12/28 21/90-12/14 7/90-36/14 7/90-12/42 35/90-12/14 7/90-60/14 7/90-12/70 49/90-12/14 7/90-84/14 7/90-12/98