Subtract 42/16 from 18/10
1st number: 1 8/10, 2nd number: 2 10/16
18/10 - 42/16 is -33/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
18/10 = 18 × 8/10 × 8 = 144/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
42/16 = 42 × 5/16 × 5 = 210/80 - Subtract the two like fractions:
144/80 - 210/80 = 144 - 210/80 = -66/80 - After reducing the fraction, the answer is -33/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/10-42/16 18/10-84/16 18/20-42/16 18/10-42/32 54/10-42/16 18/30-42/16 18/10-42/48 90/10-42/16 18/50-42/16 18/10-42/80 18/70-42/16