Subtract 4/70 from 28/49
28/49 - 4/70 is 18/35.
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,
28/49 = 28 × 10/49 × 10 = 280/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
4/70 = 4 × 7/70 × 7 = 28/490 - Subtract the two like fractions:
280/490 - 28/490 = 280 - 28/490 = 252/490 - After reducing the fraction, the answer is 18/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/49-4/70 28/49-8/70 28/98-4/70 84/49-4/70 28/49-12/70 28/49-20/70 28/49-28/70