Subtract 90/50 from 42/12
1st number: 3 6/12, 2nd number: 1 40/50
42/12 - 90/50 is 17/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 50 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
42/12 = 42 × 25/12 × 25 = 1050/300 - Likewise, for the 2nd fraction, since 50 × 6 = 300,
90/50 = 90 × 6/50 × 6 = 540/300 - Subtract the two like fractions:
1050/300 - 540/300 = 1050 - 540/300 = 510/300 - After reducing the fraction, the answer is 17/10
- In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-90/50 42/24-90/50 42/36-90/50 42/60-90/50 42/84-90/50