Subtract 54/10 from 42/2
1st number: 21 0/2, 2nd number: 5 4/10
42/2 - 54/10 is 78/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
42/2 = 42 × 5/2 × 5 = 210/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
54/10 = 54 × 1/10 × 1 = 54/10 - Subtract the two like fractions:
210/10 - 54/10 = 210 - 54/10 = 156/10 - After reducing the fraction, the answer is 78/5
- In mixed form: 153/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-54/10 42/4-54/10 42/2-54/20 42/6-54/10 42/2-54/30 42/10-54/10 42/2-54/50 42/14-54/10 42/2-54/70