Subtract 40/30 from 30/84
1st number: 30/84, 2nd number: 1 10/30
30/84 - 40/30 is -41/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
30/84 = 30 × 5/84 × 5 = 150/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
40/30 = 40 × 14/30 × 14 = 560/420 - Subtract the two like fractions:
150/420 - 560/420 = 150 - 560/420 = -410/420 - After reducing the fraction, the answer is -41/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/84-40/30 30/84-80/30 30/84-40/60 90/84-40/30 30/84-40/90