Subtract 90/70 from 90/12
1st number: 7 6/12, 2nd number: 1 20/70
90/12 - 90/70 is 87/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
90/12 = 90 × 35/12 × 35 = 3150/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Subtract the two like fractions:
3150/420 - 540/420 = 3150 - 540/420 = 2610/420 - After reducing the fraction, the answer is 87/14
- In mixed form: 63/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24-90/70 90/36-90/70 90/60-90/70 90/84-90/70