Subtract 56/40 from 40/90
1st number: 40/90, 2nd number: 1 16/40
40/90 - 56/40 is -43/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
40/90 = 40 × 4/90 × 4 = 160/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
56/40 = 56 × 9/40 × 9 = 504/360 - Subtract the two like fractions:
160/360 - 504/360 = 160 - 504/360 = -344/360 - After reducing the fraction, the answer is -43/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90-56/40 40/90-56/80