Subtract 1/15 from 80/84
80/84 - 1/15 is 31/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
80/84 = 80 × 5/84 × 5 = 400/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
1/15 = 1 × 28/15 × 28 = 28/420 - Subtract the two like fractions:
400/420 - 28/420 = 400 - 28/420 = 372/420 - After reducing the fraction, the answer is 31/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84-2/15 80/84-1/30 80/84-3/15 80/84-1/45 80/84-5/15 80/84-1/75 80/84-7/15