Subtract 80/84 from 25/63
25/63 - 80/84 is -5/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
25/63 = 25 × 4/63 × 4 = 100/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
80/84 = 80 × 3/84 × 3 = 240/252 - Subtract the two like fractions:
100/252 - 240/252 = 100 - 240/252 = -140/252 - After reducing the fraction, the answer is -5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/63-80/84 75/63-80/84