Subtract 30/70 from 42/49
42/49 - 30/70 is 3/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
42/49 = 42 × 10/49 × 10 = 420/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
30/70 = 30 × 7/70 × 7 = 210/490 - Subtract the two like fractions:
420/490 - 210/490 = 420 - 210/490 = 210/490 - After reducing the fraction, the answer is 3/7
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