Subtract 45/72 from 45/49
45/49 - 45/72 is 115/392.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 72 is 3528
Next, find the equivalent fraction of both fractional numbers with denominator 3528 - For the 1st fraction, since 49 × 72 = 3528,
45/49 = 45 × 72/49 × 72 = 3240/3528 - Likewise, for the 2nd fraction, since 72 × 49 = 3528,
45/72 = 45 × 49/72 × 49 = 2205/3528 - Subtract the two like fractions:
3240/3528 - 2205/3528 = 3240 - 2205/3528 = 1035/3528 - After reducing the fraction, the answer is 115/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/49-45/72 45/49-90/72 45/98-45/72