Subtract 9/5 from 80/42
1st number: 1 38/42, 2nd number: 1 4/5
80/42 - 9/5 is 11/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Likewise, for the 2nd fraction, since 5 × 42 = 210,
9/5 = 9 × 42/5 × 42 = 378/210 - Subtract the two like fractions:
400/210 - 378/210 = 400 - 378/210 = 22/210 - After reducing the fraction, the answer is 11/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42-18/5 80/84-9/5 80/42-9/10 80/42-27/5 80/42-9/15 80/42-45/5 80/42-9/25 80/42-63/5 80/42-9/35