Subtract 45/8 from 84/42
1st number: 2 0/42, 2nd number: 5 5/8
84/42 - 45/8 is -29/8.
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,
84/42 = 84 × 4/42 × 4 = 336/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
45/8 = 45 × 21/8 × 21 = 945/168 - Subtract the two like fractions:
336/168 - 945/168 = 336 - 945/168 = -609/168 - After reducing the fraction, the answer is -29/8
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