Subtract 18/40 from 42/98
42/98 - 18/40 is -3/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 98 × 20 = 1960,
42/98 = 42 × 20/98 × 20 = 840/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
18/40 = 18 × 49/40 × 49 = 882/1960 - Subtract the two like fractions:
840/1960 - 882/1960 = 840 - 882/1960 = -42/1960 - After reducing the fraction, the answer is -3/140
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