Subtract 42/10 from 42/20
1st number: 2 2/20, 2nd number: 4 2/10
42/20 - 42/10 is -21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
42/20 = 42 × 1/20 × 1 = 42/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
42/10 = 42 × 2/10 × 2 = 84/20 - Subtract the two like fractions:
42/20 - 84/20 = 42 - 84/20 = -42/20 - After reducing the fraction, the answer is -21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-42/10 42/20-84/10 42/40-42/10 42/20-42/20 42/60-42/10 42/20-42/30 42/20-42/50 42/20-42/70