Subtract 80/10 from 42/4
1st number: 10 2/4, 2nd number: 8 0/10
42/4 - 80/10 is 5/2.
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,
80/10 = 80 × 2/10 × 2 = 160/20 - Subtract the two like fractions:
210/20 - 160/20 = 210 - 160/20 = 50/20 - After reducing the fraction, the answer is 5/2
- In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-80/10 42/8-80/10 42/4-80/20 42/12-80/10 42/4-80/30 42/20-80/10 42/4-80/50 42/28-80/10 42/4-80/70