Subtract 16/70 from 21/12
1st number: 1 9/12, 2nd number: 16/70
21/12 - 16/70 is 213/140.
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,
21/12 = 21 × 35/12 × 35 = 735/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
16/70 = 16 × 6/70 × 6 = 96/420 - Subtract the two like fractions:
735/420 - 96/420 = 735 - 96/420 = 639/420 - After reducing the fraction, the answer is 213/140
- In mixed form: 173/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-16/70 21/12-32/70 21/24-16/70 63/12-16/70 21/12-48/70 21/36-16/70 21/12-80/70 21/60-16/70 21/84-16/70