Subtract 72/84 from 9/10
9/10 - 72/84 is 3/70.
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,
72/84 = 72 × 5/84 × 5 = 360/420 - Subtract the two like fractions:
378/420 - 360/420 = 378 - 360/420 = 18/420 - After reducing the fraction, the answer is 3/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-72/84 9/20-72/84 27/10-72/84 9/30-72/84 45/10-72/84 9/50-72/84 63/10-72/84 9/70-72/84