Subtract 8/10 from 7/84
7/84 - 8/10 is -43/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
8/10 = 8 × 42/10 × 42 = 336/420 - Subtract the two like fractions:
35/420 - 336/420 = 35 - 336/420 = -301/420 - After reducing the fraction, the answer is -43/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-8/10 7/84-16/10 7/84-8/20 21/84-8/10 7/84-24/10 7/84-8/30 35/84-8/10 7/84-40/10 7/84-8/50 49/84-8/10 7/84-56/10 7/84-8/70