Subtract 15/80 from 45/84
45/84 - 15/80 is 39/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
45/84 = 45 × 20/84 × 20 = 900/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
15/80 = 15 × 21/80 × 21 = 315/1680 - Subtract the two like fractions:
900/1680 - 315/1680 = 900 - 315/1680 = 585/1680 - After reducing the fraction, the answer is 39/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84-15/80 45/84-30/80 45/84-45/80 45/84-75/80