Subtract 40/80 from 7/63
7/63 - 40/80 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 80 is 5040
Next, find the equivalent fraction of both fractional numbers with denominator 5040 - For the 1st fraction, since 63 × 80 = 5040,
7/63 = 7 × 80/63 × 80 = 560/5040 - Likewise, for the 2nd fraction, since 80 × 63 = 5040,
40/80 = 40 × 63/80 × 63 = 2520/5040 - Subtract the two like fractions:
560/5040 - 2520/5040 = 560 - 2520/5040 = -1960/5040 - After reducing the fraction, the answer is -7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-40/80 21/63-40/80 35/63-40/80 49/63-40/80