Subtract 9/42 from 9/21
921 - 942 is 314.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
921 = 9 × 221 × 2 = 1842 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
942 = 9 × 142 × 1 = 942 - Subtract the two like fractions:
1842 - 942 = 18 - 942 = 942 - After reducing the fraction, the answer is 314
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