Subtract 45/15 from 45/80
1st number: 45/80, 2nd number: 3 0/15
45/80 - 45/15 is -39/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 15 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
45/80 = 45 × 3/80 × 3 = 135/240 - Likewise, for the 2nd fraction, since 15 × 16 = 240,
45/15 = 45 × 16/15 × 16 = 720/240 - Subtract the two like fractions:
135/240 - 720/240 = 135 - 720/240 = -585/240 - After reducing the fraction, the answer is -39/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-45/15 45/80-90/15 45/80-45/30 45/80-45/75