Subtract 16/5 from 15/90
1st number: 15/90, 2nd number: 3 1/5
15/90 - 16/5 is -91/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
16/5 = 16 × 18/5 × 18 = 288/90 - Subtract the two like fractions:
15/90 - 288/90 = 15 - 288/90 = -273/90 - After reducing the fraction, the answer is -91/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90-16/5 15/90-32/5 15/90-16/10 45/90-16/5 15/90-48/5 15/90-16/15 75/90-16/5 15/90-80/5 15/90-16/25 15/90-16/35