Subtract 63/70 from 49/80
49/80 - 63/70 is -23/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
49/80 = 49 × 7/80 × 7 = 343/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
63/70 = 63 × 8/70 × 8 = 504/560 - Subtract the two like fractions:
343/560 - 504/560 = 343 - 504/560 = -161/560 - After reducing the fraction, the answer is -23/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/80-63/70