Subtract 3/9 from 7/8
78 - 39 is 1324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72 - For the 1st fraction, since 8 × 9 = 72,
78 = 7 × 98 × 9 = 6372 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
39 = 3 × 89 × 8 = 2472 - Subtract the two fractions:
6372 - 2472 = 63 - 2472 = 3972 - After reducing the fraction, the answer is 1324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8-3/9 7/8-6/9 7/16-3/9 7/8-3/18 21/8-3/9 7/24-3/9 7/8-3/27 35/8-3/9 7/8-15/9 7/40-3/9 7/8-3/45 49/8-3/9 7/8-21/9 7/56-3/9 7/8-3/63