Subtract 40/8 from 7/45
1st number: 7/45, 2nd number: 5 0/8
7/45 - 40/8 is -218/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
7/45 = 7 × 8/45 × 8 = 56/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
40/8 = 40 × 45/8 × 45 = 1800/360 - Subtract the two like fractions:
56/360 - 1800/360 = 56 - 1800/360 = -1744/360 - After reducing the fraction, the answer is -218/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-40/8 7/45-80/8 7/90-40/8 7/45-40/16 21/45-40/8 7/45-40/24 35/45-40/8 49/45-40/8 7/45-40/56