Subtract 90/36 from 42/50
1st number: 42/50, 2nd number: 2 18/36
42/50 - 90/36 is -83/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 36 is 900
Next, find the equivalent fraction of both fractional numbers with denominator 900 - For the 1st fraction, since 50 × 18 = 900,
42/50 = 42 × 18/50 × 18 = 756/900 - Likewise, for the 2nd fraction, since 36 × 25 = 900,
90/36 = 90 × 25/36 × 25 = 2250/900 - Subtract the two like fractions:
756/900 - 2250/900 = 756 - 2250/900 = -1494/900 - After reducing the fraction, the answer is -83/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-90/36 42/50-90/72