Subtract 90/84 from 8/10
1st number: 8/10, 2nd number: 1 6/84
8/10 - 90/84 is -19/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
8/10 = 8 × 42/10 × 42 = 336/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Subtract the two like fractions:
336/420 - 450/420 = 336 - 450/420 = -114/420 - After reducing the fraction, the answer is -19/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10-90/84 8/20-90/84 24/10-90/84 8/30-90/84 40/10-90/84 8/50-90/84 56/10-90/84 8/70-90/84