Subtract 90/7 from 50/90
1st number: 50/90, 2nd number: 12 6/7
50/90 - 90/7 is -775/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
50/90 = 50 × 7/90 × 7 = 350/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
90/7 = 90 × 90/7 × 90 = 8100/630 - Subtract the two like fractions:
350/630 - 8100/630 = 350 - 8100/630 = -7750/630 - After reducing the fraction, the answer is -775/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90-90/14 50/90-90/21 50/90-90/35 50/90-90/49