Subtract 4/90 from 81/5
1st number: 16 1/5, 2nd number: 4/90
81/5 - 4/90 is 727/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
81/5 = 81 × 18/5 × 18 = 1458/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
4/90 = 4 × 1/90 × 1 = 4/90 - Subtract the two like fractions:
1458/90 - 4/90 = 1458 - 4/90 = 1454/90 - After reducing the fraction, the answer is 727/45
- In mixed form: 167/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5-8/90 81/10-4/90 81/5-12/90 81/15-4/90 81/5-20/90 81/25-4/90 81/5-28/90 81/35-4/90