Subtract 18/10 from 12/84
1st number: 12/84, 2nd number: 1 8/10
12/84 - 18/10 is -58/35.
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,
12/84 = 12 × 5/84 × 5 = 60/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
18/10 = 18 × 42/10 × 42 = 756/420 - Subtract the two like fractions:
60/420 - 756/420 = 60 - 756/420 = -696/420 - After reducing the fraction, the answer is -58/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84-18/10 12/84-36/10 12/84-18/20 36/84-18/10 12/84-54/10 12/84-18/30 60/84-18/10 12/84-90/10 12/84-18/50 12/84-18/70