Subtract 2/20 from 54/42
1st number: 1 12/42, 2nd number: 2/20
54/42 - 2/20 is 83/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
54/42 = 54 × 10/42 × 10 = 540/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
2/20 = 2 × 21/20 × 21 = 42/420 - Subtract the two like fractions:
540/420 - 42/420 = 540 - 42/420 = 498/420 - After reducing the fraction, the answer is 83/70
- In mixed form: 113/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-4/20 54/84-2/20 54/42-2/40 54/42-6/20 54/42-2/60 54/42-10/20 54/42-14/20