Subtract 5/50 from 42/90
42/90 - 5/50 is 11/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
42/90 = 42 × 5/90 × 5 = 210/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
5/50 = 5 × 9/50 × 9 = 45/450 - Subtract the two like fractions:
210/450 - 45/450 = 210 - 45/450 = 165/450 - After reducing the fraction, the answer is 11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90-5/50 42/90-10/50 42/90-15/50 42/90-25/50 42/90-35/50