Subtract 42/8 from 27/10
1st number: 2 7/10, 2nd number: 5 2/8
27/10 - 42/8 is -51/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
27/10 = 27 × 4/10 × 4 = 108/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
42/8 = 42 × 5/8 × 5 = 210/40 - Subtract the two like fractions:
108/40 - 210/40 = 108 - 210/40 = -102/40 - After reducing the fraction, the answer is -51/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/10-42/8 27/10-84/8 27/20-42/8 27/10-42/16 81/10-42/8 27/30-42/8 27/10-42/24 27/50-42/8 27/10-42/40 27/70-42/8 27/10-42/56