Subtract 6/7 from 7/45
7/45 - 6/7 is -221/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
7/45 = 7 × 7/45 × 7 = 49/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
6/7 = 6 × 45/7 × 45 = 270/315 - Subtract the two like fractions:
49/315 - 270/315 = 49 - 270/315 = -221/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-6/7 7/45-12/7 7/90-6/7 7/45-6/14 21/45-6/7 7/45-18/7 7/45-6/21 35/45-6/7 7/45-30/7 7/45-6/35 49/45-6/7 7/45-42/7 7/45-6/49