Subtract 3/84 from 9/10
9/10 - 3/84 is 121/140.
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,
9/10 = 9 × 42/10 × 42 = 378/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
3/84 = 3 × 5/84 × 5 = 15/420 - Subtract the two like fractions:
378/420 - 15/420 = 378 - 15/420 = 363/420 - After reducing the fraction, the answer is 121/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-3/84 9/10-6/84 9/20-3/84 27/10-3/84 9/10-9/84 9/30-3/84 45/10-3/84 9/10-15/84 9/50-3/84 63/10-3/84 9/10-21/84 9/70-3/84