Subtract 45/84 from 9/30
9/30 - 45/84 is -33/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
9/30 = 9 × 14/30 × 14 = 126/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
45/84 = 45 × 5/84 × 5 = 225/420 - Subtract the two like fractions:
126/420 - 225/420 = 126 - 225/420 = -99/420 - After reducing the fraction, the answer is -33/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-45/84 9/30-90/84 9/60-45/84 27/30-45/84 9/90-45/84 45/30-45/84 63/30-45/84