Subtract 90/49 from 40/72
1st number: 40/72, 2nd number: 1 41/49
40/72 - 90/49 is -565/441.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 49 is 3528
Next, find the equivalent fraction of both fractional numbers with denominator 3528 - For the 1st fraction, since 72 × 49 = 3528,
40/72 = 40 × 49/72 × 49 = 1960/3528 - Likewise, for the 2nd fraction, since 49 × 72 = 3528,
90/49 = 90 × 72/49 × 72 = 6480/3528 - Subtract the two like fractions:
1960/3528 - 6480/3528 = 1960 - 6480/3528 = -4520/3528 - After reducing the fraction, the answer is -565/441
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/72-90/49 40/72-90/98