Subtract 45/20 from 42/6
1st number: 7 0/6, 2nd number: 2 5/20
42/6 - 45/20 is 19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 6 × 10 = 60,
42/6 = 42 × 10/6 × 10 = 420/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Subtract the two like fractions:
420/60 - 135/60 = 420 - 135/60 = 285/60 - After reducing the fraction, the answer is 19/4
- In mixed form: 43/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/6-45/20 42/6-90/20 42/12-45/20 42/6-45/40 42/18-45/20 42/6-45/60 42/30-45/20