Subtract 15/70 from 18/54
18/54 - 15/70 is 5/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 54 × 35 = 1890,
18/54 = 18 × 35/54 × 35 = 630/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
15/70 = 15 × 27/70 × 27 = 405/1890 - Subtract the two like fractions:
630/1890 - 405/1890 = 630 - 405/1890 = 225/1890 - After reducing the fraction, the answer is 5/42
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