Subtract 16/4 from 40/90
1st number: 40/90, 2nd number: 4 0/4
40/90 - 16/4 is -32/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
40/90 = 40 × 2/90 × 2 = 80/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
16/4 = 16 × 45/4 × 45 = 720/180 - Subtract the two like fractions:
80/180 - 720/180 = 80 - 720/180 = -640/180 - After reducing the fraction, the answer is -32/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90-16/4 40/90-32/4 40/90-16/8 40/90-48/4 40/90-16/12 40/90-80/4 40/90-16/20 40/90-16/28