Subtract 40/90 from 16/40
16/40 - 40/90 is -2/45.
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,
16/40 = 16 × 9/40 × 9 = 144/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
40/90 = 40 × 4/90 × 4 = 160/360 - Subtract the two like fractions:
144/360 - 160/360 = 144 - 160/360 = -16/360 - After reducing the fraction, the answer is -2/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/40-40/90 16/40-80/90 16/80-40/90 48/40-40/90 80/40-40/90