Subtract 7/10 from 10/90
10/90 - 7/10 is -53/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
10/90 = 10 × 1/90 × 1 = 10/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
7/10 = 7 × 9/10 × 9 = 63/90 - Subtract the two like fractions:
10/90 - 63/90 = 10 - 63/90 = -53/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90-7/10 10/90-14/10 10/90-7/20 30/90-7/10 10/90-21/10 10/90-7/30 50/90-7/10 10/90-35/10 10/90-7/50 70/90-7/10 10/90-49/10 10/90-7/70