Subtract 42/8 from 45/2
1st number: 22 1/2, 2nd number: 5 2/8
45/2 - 42/8 is 69/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 2 × 4 = 8,
45/2 = 45 × 4/2 × 4 = 180/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
42/8 = 42 × 1/8 × 1 = 42/8 - Subtract the two like fractions:
180/8 - 42/8 = 180 - 42/8 = 138/8 - After reducing the fraction, the answer is 69/4
- In mixed form: 171/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-42/8 45/2-84/8 45/4-42/8 45/2-42/16 45/6-42/8 45/2-42/24 45/10-42/8 45/2-42/40 45/14-42/8 45/2-42/56