Subtract 90/84 from 8/70
1st number: 8/70, 2nd number: 1 6/84
8/70 - 90/84 is -67/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
8/70 = 8 × 6/70 × 6 = 48/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Subtract the two like fractions:
48/420 - 450/420 = 48 - 450/420 = -402/420 - After reducing the fraction, the answer is -67/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/70-90/84 24/70-90/84 40/70-90/84 56/70-90/84