Subtract 10/70 from 42/49
42/49 - 10/70 is 5/7.
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,
42/49 = 42 × 10/49 × 10 = 420/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
10/70 = 10 × 7/70 × 7 = 70/490 - Subtract the two like fractions:
420/490 - 70/490 = 420 - 70/490 = 350/490 - After reducing the fraction, the answer is 5/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/49-10/70 42/49-20/70 42/98-10/70 42/49-30/70 42/49-50/70