Subtract 70/72 from 28/84
28/84 - 70/72 is -23/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
28/84 = 28 × 6/84 × 6 = 168/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
70/72 = 70 × 7/72 × 7 = 490/504 - Subtract the two like fractions:
168/504 - 490/504 = 168 - 490/504 = -322/504 - After reducing the fraction, the answer is -23/36
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Related: 56/84-70/72