Subtract 28/8 from 25/42
1st number: 25/42, 2nd number: 3 4/8
25/42 - 28/8 is -61/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
25/42 = 25 × 4/42 × 4 = 100/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
28/8 = 28 × 21/8 × 21 = 588/168 - Subtract the two like fractions:
100/168 - 588/168 = 100 - 588/168 = -488/168 - After reducing the fraction, the answer is -61/21
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