Subtract 42/90 from 8/75
8/75 - 42/90 is -9/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
8/75 = 8 × 6/75 × 6 = 48/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
42/90 = 42 × 5/90 × 5 = 210/450 - Subtract the two like fractions:
48/450 - 210/450 = 48 - 210/450 = -162/450 - After reducing the fraction, the answer is -9/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/75-42/90 8/75-84/90 24/75-42/90 40/75-42/90 56/75-42/90