Subtract 50/90 from 4/40
4/40 - 50/90 is -41/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
4/40 = 4 × 9/40 × 9 = 36/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
50/90 = 50 × 4/90 × 4 = 200/360 - Subtract the two like fractions:
36/360 - 200/360 = 36 - 200/360 = -164/360 - After reducing the fraction, the answer is -41/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/40-50/90 4/80-50/90 12/40-50/90 20/40-50/90 28/40-50/90