Subtract 32/90 from 42/50
42/50 - 32/90 is 109/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
42/50 = 42 × 9/50 × 9 = 378/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
32/90 = 32 × 5/90 × 5 = 160/450 - Subtract the two like fractions:
378/450 - 160/450 = 378 - 160/450 = 218/450 - After reducing the fraction, the answer is 109/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-32/90 42/50-64/90 42/50-96/90