Subtract 90/70 from 3/49
1st number: 3/49, 2nd number: 1 20/70
3/49 - 90/70 is -60/49.
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,
3/49 = 3 × 10/49 × 10 = 30/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
90/70 = 90 × 7/70 × 7 = 630/490 - Subtract the two like fractions:
30/490 - 630/490 = 30 - 630/490 = -600/490 - After reducing the fraction, the answer is -60/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/49-90/70 3/98-90/70 9/49-90/70 15/49-90/70 21/49-90/70