Subtract 80/63 from 70/80
1st number: 70/80, 2nd number: 1 17/63
70/80 - 80/63 is -199/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 63 is 5040
Next, find the equivalent fraction of both fractional numbers with denominator 5040 - For the 1st fraction, since 80 × 63 = 5040,
70/80 = 70 × 63/80 × 63 = 4410/5040 - Likewise, for the 2nd fraction, since 63 × 80 = 5040,
80/63 = 80 × 80/63 × 80 = 6400/5040 - Subtract the two like fractions:
4410/5040 - 6400/5040 = 4410 - 6400/5040 = -1990/5040 - After reducing the fraction, the answer is -199/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: