Subtract 10/21 from 4/20
4/20 - 10/21 is -29/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
4/20 = 4 × 21/20 × 21 = 84/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
10/21 = 10 × 20/21 × 20 = 200/420 - Subtract the two like fractions:
84/420 - 200/420 = 84 - 200/420 = -116/420 - After reducing the fraction, the answer is -29/105
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