Subtract 81/60 from 42/50
1st number: 42/50, 2nd number: 1 21/60
42/50 - 81/60 is -51/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 60 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 50 × 6 = 300,
42/50 = 42 × 6/50 × 6 = 252/300 - Likewise, for the 2nd fraction, since 60 × 5 = 300,
81/60 = 81 × 5/60 × 5 = 405/300 - Subtract the two like fractions:
252/300 - 405/300 = 252 - 405/300 = -153/300 - After reducing the fraction, the answer is -51/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-81/60