Subtract 70/14 from 90/42
1st number: 2 6/42, 2nd number: 5 0/14
90/42 - 70/14 is -20/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
90/42 = 90 × 1/42 × 1 = 90/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
70/14 = 70 × 3/14 × 3 = 210/42 - Subtract the two like fractions:
90/42 - 210/42 = 90 - 210/42 = -120/42 - After reducing the fraction, the answer is -20/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84-70/14 90/42-70/28 90/42-70/42 90/42-70/98