Subtract 80/70 from 81/49
1st number: 1 32/49, 2nd number: 1 10/70
81/49 - 80/70 is 25/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
81/49 = 81 × 10/49 × 10 = 810/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
80/70 = 80 × 7/70 × 7 = 560/490 - Subtract the two like fractions:
810/490 - 560/490 = 810 - 560/490 = 250/490 - After reducing the fraction, the answer is 25/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/98-80/70