Subtract 84/45 from 15/30
1st number: 15/30, 2nd number: 1 39/45
15/30 - 84/45 is -41/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
84/45 = 84 × 2/45 × 2 = 168/90 - Subtract the two like fractions:
45/90 - 168/90 = 45 - 168/90 = -123/90 - After reducing the fraction, the answer is -41/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/60-84/45 15/30-84/90 45/30-84/45 15/90-84/45 75/30-84/45