Subtract 42/49 from 7/70
7/70 - 42/49 is -53/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 49 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
7/70 = 7 × 7/70 × 7 = 49/490 - Likewise, for the 2nd fraction, since 49 × 10 = 490,
42/49 = 42 × 10/49 × 10 = 420/490 - Subtract the two like fractions:
49/490 - 420/490 = 49 - 420/490 = -371/490 - After reducing the fraction, the answer is -53/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70-42/49 7/70-84/49 7/70-42/98 21/70-42/49 35/70-42/49 49/70-42/49