Subtract 21/12 from 16/70
1st number: 16/70, 2nd number: 1 9/12
16/70 - 21/12 is -213/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
16/70 = 16 × 6/70 × 6 = 96/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
21/12 = 21 × 35/12 × 35 = 735/420 - Subtract the two like fractions:
96/420 - 735/420 = 96 - 735/420 = -639/420 - After reducing the fraction, the answer is -213/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/70-21/12 16/70-42/12 16/70-21/24 48/70-21/12 16/70-63/12 16/70-21/36 80/70-21/12 16/70-21/60 16/70-21/84