Subtract 90/70 from 16/12
1st number: 1 4/12, 2nd number: 1 20/70
16/12 - 90/70 is 1/21.
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,
16/12 = 16 × 35/12 × 35 = 560/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Subtract the two like fractions:
560/420 - 540/420 = 560 - 540/420 = 20/420 - After reducing the fraction, the answer is 1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/12-90/70 16/24-90/70 48/12-90/70 16/36-90/70 80/12-90/70 16/60-90/70 16/84-90/70