Subtract 84/90 from 8/15
8/15 - 84/90 is -2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
8/15 = 8 × 6/15 × 6 = 48/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
84/90 = 84 × 1/90 × 1 = 84/90 - Subtract the two like fractions:
48/90 - 84/90 = 48 - 84/90 = -36/90 - After reducing the fraction, the answer is -2/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/15-84/90 8/30-84/90 24/15-84/90 8/45-84/90 40/15-84/90 8/75-84/90 56/15-84/90