Subtract 28/70 from 4/49
4/49 - 28/70 is -78/245.
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,
4/49 = 4 × 10/49 × 10 = 40/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
28/70 = 28 × 7/70 × 7 = 196/490 - Subtract the two like fractions:
40/490 - 196/490 = 40 - 196/490 = -156/490 - After reducing the fraction, the answer is -78/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/49-28/70 4/49-56/70 4/98-28/70 12/49-28/70 4/49-84/70 20/49-28/70 28/49-28/70