Subtract 12/45 from 5/7
5/7 - 12/45 is 47/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
5/7 = 5 × 45/7 × 45 = 225/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
12/45 = 12 × 7/45 × 7 = 84/315 - Subtract the two like fractions:
225/315 - 84/315 = 225 - 84/315 = 141/315 - After reducing the fraction, the answer is 47/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7-12/45 5/7-24/45 5/14-12/45 5/7-12/90 15/7-12/45 5/7-36/45 5/21-12/45 25/7-12/45 5/7-60/45 5/35-12/45 35/7-12/45 5/7-84/45 5/49-12/45