Subtract 25/42 from 12/45
12/45 - 25/42 is -23/70.
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,
12/45 = 12 × 14/45 × 14 = 168/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
25/42 = 25 × 15/42 × 15 = 375/630 - Subtract the two like fractions:
168/630 - 375/630 = 168 - 375/630 = -207/630 - After reducing the fraction, the answer is -23/70
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