Subtract 1/84 from 70/72
70/72 - 1/84 is 121/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
70/72 = 70 × 7/72 × 7 = 490/504 - Likewise, for the 2nd fraction, since 84 × 6 = 504,
1/84 = 1 × 6/84 × 6 = 6/504 - Subtract the two like fractions:
490/504 - 6/504 = 490 - 6/504 = 484/504 - After reducing the fraction, the answer is 121/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72-2/84 70/72-3/84 70/72-5/84 70/72-7/84