Subtract 90/84 from 16/15
1st number: 1 1/15, 2nd number: 1 6/84
16/15 - 90/84 is -1/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
16/15 = 16 × 28/15 × 28 = 448/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Subtract the two like fractions:
448/420 - 450/420 = 448 - 450/420 = -2/420 - After reducing the fraction, the answer is -1/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/15-90/84 16/30-90/84 48/15-90/84 16/45-90/84 80/15-90/84 16/75-90/84