Subtract 4/42 from 2/45
2/45 - 4/42 is -16/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
2/45 = 2 × 14/45 × 14 = 28/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
4/42 = 4 × 15/42 × 15 = 60/630 - Subtract the two like fractions:
28/630 - 60/630 = 28 - 60/630 = -32/630 - After reducing the fraction, the answer is -16/315
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