Subtract 15/10 from 2/84
1st number: 2/84, 2nd number: 1 5/10
2/84 - 15/10 is -31/21.
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,
2/84 = 2 × 5/84 × 5 = 10/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
15/10 = 15 × 42/10 × 42 = 630/420 - Subtract the two like fractions:
10/420 - 630/420 = 10 - 630/420 = -620/420 - After reducing the fraction, the answer is -31/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/84-15/10 2/84-30/10 2/84-15/20 6/84-15/10 2/84-45/10 2/84-15/30 10/84-15/10 2/84-75/10 2/84-15/50 14/84-15/10 2/84-15/70