Subtract 25/4 from 81/30
1st number: 2 21/30, 2nd number: 6 1/4
81/30 - 25/4 is -71/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
81/30 = 81 × 2/30 × 2 = 162/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
25/4 = 25 × 15/4 × 15 = 375/60 - Subtract the two like fractions:
162/60 - 375/60 = 162 - 375/60 = -213/60 - After reducing the fraction, the answer is -71/20
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