Subtract 40/30 from 3/84
1st number: 3/84, 2nd number: 1 10/30
3/84 - 40/30 is -109/84.
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,
3/84 = 3 × 5/84 × 5 = 15/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
40/30 = 40 × 14/30 × 14 = 560/420 - Subtract the two like fractions:
15/420 - 560/420 = 15 - 560/420 = -545/420 - After reducing the fraction, the answer is -109/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84-40/30 3/84-80/30 3/84-40/60 9/84-40/30 3/84-40/90 15/84-40/30 21/84-40/30