Subtract 7/8 from 6/80
680 - 78 is -45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 8 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
680 = 6 × 180 × 1 = 680 - Likewise, for the 2nd fraction, since 8 × 10 = 80,
78 = 7 × 108 × 10 = 7080 - Subtract the two like fractions:
680 - 7080 = 6 - 7080 = -6480 - After reducing the fraction, the answer is -45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/80-7/8 6/80-14/8 6/80-7/16 18/80-7/8 6/80-21/8 6/80-7/24 30/80-7/8 6/80-35/8 6/80-7/40 42/80-7/8 6/80-49/8 6/80-7/56