Subtract 42/16 from 30/8
1st number: 3 6/8, 2nd number: 2 10/16
30/8 - 42/16 is 9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 16 is 16
Next, find the equivalent fraction of both fractional numbers with denominator 16 - For the 1st fraction, since 8 × 2 = 16,
30/8 = 30 × 2/8 × 2 = 60/16 - Likewise, for the 2nd fraction, since 16 × 1 = 16,
42/16 = 42 × 1/16 × 1 = 42/16 - Subtract the two like fractions:
60/16 - 42/16 = 60 - 42/16 = 18/16 - After reducing the fraction, the answer is 9/8
- In mixed form: 11/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8-42/16 30/8-84/16 30/16-42/16 30/8-42/32 90/8-42/16 30/24-42/16 30/8-42/48 30/40-42/16 30/8-42/80 30/56-42/16