Subtract 5/42 from 12/90
12/90 - 5/42 is 1/70.
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,
12/90 = 12 × 7/90 × 7 = 84/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
5/42 = 5 × 15/42 × 15 = 75/630 - Subtract the two like fractions:
84/630 - 75/630 = 84 - 75/630 = 9/630 - After reducing the fraction, the answer is 1/70
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