Subtract 30/10 from 42/4
1st number: 10 2/4, 2nd number: 3 0/10
42/4 - 30/10 is 15/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 10 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 10 × 2 = 20,
30/10 = 30 × 2/10 × 2 = 60/20 - Subtract the two like fractions:
210/20 - 60/20 = 210 - 60/20 = 150/20 - After reducing the fraction, the answer is 15/2
- In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-30/10 42/4-60/10 42/8-30/10 42/4-30/20 42/4-90/10 42/12-30/10 42/20-30/10 42/4-30/50 42/28-30/10 42/4-30/70