Subtract 75/90 from 6/7
6/7 - 75/90 is 1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
6/7 = 6 × 90/7 × 90 = 540/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
75/90 = 75 × 7/90 × 7 = 525/630 - Subtract the two like fractions:
540/630 - 525/630 = 540 - 525/630 = 15/630 - After reducing the fraction, the answer is 1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/7-75/90 6/14-75/90 18/7-75/90 6/21-75/90 30/7-75/90 6/35-75/90 42/7-75/90 6/49-75/90