Subtract 32/84 from 20/70
20/70 - 32/84 is -2/21.
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,
20/70 = 20 × 6/70 × 6 = 120/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
32/84 = 32 × 5/84 × 5 = 160/420 - Subtract the two like fractions:
120/420 - 160/420 = 120 - 160/420 = -40/420 - After reducing the fraction, the answer is -2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-32/84 20/70-64/84 60/70-32/84 20/70-96/84