Subtract 1/42 from 20/50
20/50 - 1/42 is 79/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 50 × 21 = 1050,
20/50 = 20 × 21/50 × 21 = 420/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
1/42 = 1 × 25/42 × 25 = 25/1050 - Subtract the two like fractions:
420/1050 - 25/1050 = 420 - 25/1050 = 395/1050 - After reducing the fraction, the answer is 79/210
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