Subtract 42/90 from 40/36
1st number: 1 4/36, 2nd number: 42/90
40/36 - 42/90 is 29/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
40/36 = 40 × 5/36 × 5 = 200/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
42/90 = 42 × 2/90 × 2 = 84/180 - Subtract the two like fractions:
200/180 - 84/180 = 200 - 84/180 = 116/180 - After reducing the fraction, the answer is 29/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/36-42/90 40/36-84/90 40/72-42/90