Subtract 7/40 from 72/84
72/84 - 7/40 is 191/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
72/84 = 72 × 10/84 × 10 = 720/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
7/40 = 7 × 21/40 × 21 = 147/840 - Subtract the two like fractions:
720/840 - 147/840 = 720 - 147/840 = 573/840 - After reducing the fraction, the answer is 191/280
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