Subtract 42/16 from 90/5
1st number: 18 0/5, 2nd number: 2 10/16
90/5 - 42/16 is 123/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
90/5 = 90 × 16/5 × 16 = 1440/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
42/16 = 42 × 5/16 × 5 = 210/80 - Subtract the two like fractions:
1440/80 - 210/80 = 1440 - 210/80 = 1230/80 - After reducing the fraction, the answer is 123/8
- In mixed form: 153/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-84/16 90/10-42/16 90/5-42/32 90/15-42/16 90/5-42/48 90/25-42/16 90/5-42/80 90/35-42/16