Subtract 40/45 from 4/8
4/8 - 40/45 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
4/8 = 4 × 45/8 × 45 = 180/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
40/45 = 40 × 8/45 × 8 = 320/360 - Subtract the two like fractions:
180/360 - 320/360 = 180 - 320/360 = -140/360 - 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: 4/8-80/45 4/16-40/45 4/8-40/90 12/8-40/45 4/24-40/45 20/8-40/45 4/40-40/45 28/8-40/45 4/56-40/45