Subtract 30/16 from 15/18
1st number: 15/18, 2nd number: 1 14/16
15/18 - 30/16 is -25/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 18 × 8 = 144,
15/18 = 15 × 8/18 × 8 = 120/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
30/16 = 30 × 9/16 × 9 = 270/144 - Subtract the two like fractions:
120/144 - 270/144 = 120 - 270/144 = -150/144 - After reducing the fraction, the answer is -25/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18-30/16 15/18-60/16 15/36-30/16 15/18-30/32 45/18-30/16 15/18-90/16 15/54-30/16 15/18-30/48 75/18-30/16 15/90-30/16 15/18-30/80