Subtract 70/50 from 42/12
1st number: 3 6/12, 2nd number: 1 20/50
42/12 - 70/50 is 21/10.
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,
70/50 = 70 × 6/50 × 6 = 420/300 - Subtract the two like fractions:
1050/300 - 420/300 = 1050 - 420/300 = 630/300 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-70/50 42/24-70/50 42/36-70/50 42/60-70/50 42/84-70/50