Subtract 12/20 from 42/4
1st number: 10 2/4, 2nd number: 12/20
42/4 - 12/20 is 99/10.
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,
12/20 = 12 × 1/20 × 1 = 12/20 - Subtract the two like fractions:
210/20 - 12/20 = 210 - 12/20 = 198/20 - After reducing the fraction, the answer is 99/10
- In mixed form: 99/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-12/20 42/4-24/20 42/8-12/20 42/4-12/40 42/4-36/20 42/12-12/20 42/4-12/60 42/4-60/20 42/20-12/20 42/4-84/20 42/28-12/20