Subtract 72/40 from 3/84
1st number: 3/84, 2nd number: 1 32/40
3/84 - 72/40 is -247/140.
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,
3/84 = 3 × 10/84 × 10 = 30/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
72/40 = 72 × 21/40 × 21 = 1512/840 - Subtract the two like fractions:
30/840 - 1512/840 = 30 - 1512/840 = -1482/840 - After reducing the fraction, the answer is -247/140
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