Subtract 30/45 from 16/42
16/42 - 30/45 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
16/42 = 16 × 15/42 × 15 = 240/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
30/45 = 30 × 14/45 × 14 = 420/630 - Subtract the two like fractions:
240/630 - 420/630 = 240 - 420/630 = -180/630 - After reducing the fraction, the answer is -2/7
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