Subtract 7/20 from 42/4
1st number: 10 2/4, 2nd number: 7/20
42/4 - 7/20 is 203/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
42/4 = 42 × 5/4 × 5 = 210/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
7/20 = 7 × 1/20 × 1 = 7/20 - Subtract the two like fractions:
210/20 - 7/20 = 210 - 7/20 = 203/20 - In mixed form: 103/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-7/20 42/4-14/20 42/8-7/20 42/4-7/40 42/4-21/20 42/12-7/20 42/4-7/60 42/4-35/20 42/20-7/20 42/4-49/20 42/28-7/20