Subtract 20/25 from 12/84
12/84 - 20/25 is -23/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
12/84 = 12 × 25/84 × 25 = 300/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
20/25 = 20 × 84/25 × 84 = 1680/2100 - Subtract the two like fractions:
300/2100 - 1680/2100 = 300 - 1680/2100 = -1380/2100 - After reducing the fraction, the answer is -23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84-20/25 12/84-40/25 12/84-20/50 36/84-20/25 12/84-60/25 12/84-20/75 60/84-20/25