Subtract 30/27 from 70/84
1st number: 70/84, 2nd number: 1 3/27
70/84 - 30/27 is -5/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
70/84 = 70 × 9/84 × 9 = 630/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
30/27 = 30 × 28/27 × 28 = 840/756 - Subtract the two like fractions:
630/756 - 840/756 = 630 - 840/756 = -210/756 - After reducing the fraction, the answer is -5/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84-60/27 70/84-30/54 70/84-90/27 70/84-30/81