Subtract 42/20 from 7/10
1st number: 7/10, 2nd number: 2 2/20
7/10 - 42/20 is -7/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
7/10 = 7 × 2/10 × 2 = 14/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
42/20 = 42 × 1/20 × 1 = 42/20 - Subtract the two like fractions:
14/20 - 42/20 = 14 - 42/20 = -28/20 - After reducing the fraction, the answer is -7/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10-42/20 7/10-84/20 7/20-42/20 7/10-42/40 21/10-42/20 7/30-42/20 7/10-42/60 35/10-42/20 7/50-42/20 49/10-42/20 7/70-42/20