Subtract 90/5 from 42/50
1st number: 42/50, 2nd number: 18 0/5
42/50 - 90/5 is -429/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 5 is 50
Next, find the equivalent fraction of both fractional numbers with denominator 50 - For the 1st fraction, since 50 × 1 = 50,
42/50 = 42 × 1/50 × 1 = 42/50 - Likewise, for the 2nd fraction, since 5 × 10 = 50,
90/5 = 90 × 10/5 × 10 = 900/50 - Subtract the two like fractions:
42/50 - 900/50 = 42 - 900/50 = -858/50 - After reducing the fraction, the answer is -429/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-90/5 42/50-90/10 42/50-90/15 42/50-90/25 42/50-90/35