Subtract 72/98 from 10/70
10/70 - 72/98 is -29/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 98 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
10/70 = 10 × 7/70 × 7 = 70/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
72/98 = 72 × 5/98 × 5 = 360/490 - Subtract the two like fractions:
70/490 - 360/490 = 70 - 360/490 = -290/490 - After reducing the fraction, the answer is -29/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/70-72/98 30/70-72/98 50/70-72/98