Subtract 2/7 from 7/45
7/45 - 2/7 is -41/315.
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,
2/7 = 2 × 45/7 × 45 = 90/315 - Subtract the two like fractions:
49/315 - 90/315 = 49 - 90/315 = -41/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-2/7 7/45-4/7 7/90-2/7 7/45-2/14 21/45-2/7 7/45-6/7 7/45-2/21 35/45-2/7 7/45-10/7 7/45-2/35 49/45-2/7 7/45-14/7 7/45-2/49