Subtract 2/42 from 4/80
4/80 - 2/42 is 1/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
4/80 = 4 × 21/80 × 21 = 84/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
2/42 = 2 × 40/42 × 40 = 80/1680 - Subtract the two like fractions:
84/1680 - 80/1680 = 84 - 80/1680 = 4/1680 - After reducing the fraction, the answer is 1/420
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