Subtract 40/7 from 30/84
1st number: 30/84, 2nd number: 5 5/7
30/84 - 40/7 is -75/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
30/84 = 30 × 1/84 × 1 = 30/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
40/7 = 40 × 12/7 × 12 = 480/84 - Subtract the two like fractions:
30/84 - 480/84 = 30 - 480/84 = -450/84 - After reducing the fraction, the answer is -75/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/84-40/7 30/84-80/7 30/84-40/14 90/84-40/7 30/84-40/21 30/84-40/35 30/84-40/49