Subtract 14/84 from 90/70
1st number: 1 20/70, 2nd number: 14/84
90/70 - 14/84 is 47/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
14/84 = 14 × 5/84 × 5 = 70/420 - Subtract the two like fractions:
540/420 - 70/420 = 540 - 70/420 = 470/420 - After reducing the fraction, the answer is 47/42
- In mixed form: 15/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-28/84 90/70-42/84 90/70-70/84 90/70-98/84