Subtract 16/81 from 9/5
1st number: 1 4/5, 2nd number: 16/81
9/5 - 16/81 is 649/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
9/5 = 9 × 81/5 × 81 = 729/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
16/81 = 16 × 5/81 × 5 = 80/405 - Subtract the two like fractions:
729/405 - 80/405 = 729 - 80/405 = 649/405 - In mixed form: 1244/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/5-16/81 9/5-32/81 9/10-16/81 27/5-16/81 9/5-48/81 9/15-16/81 45/5-16/81 9/5-80/81 9/25-16/81 63/5-16/81 9/35-16/81