Subtract 30/42 from 2/90
2/90 - 30/42 is -218/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
2/90 = 2 × 7/90 × 7 = 14/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
30/42 = 30 × 15/42 × 15 = 450/630 - Subtract the two like fractions:
14/630 - 450/630 = 14 - 450/630 = -436/630 - After reducing the fraction, the answer is -218/315
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