Subtract 30/45 from 42/49
42/49 - 30/45 is 4/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 45 is 2205
Next, find the equivalent fraction of both fractional numbers with denominator 2205 - For the 1st fraction, since 49 × 45 = 2205,
42/49 = 42 × 45/49 × 45 = 1890/2205 - Likewise, for the 2nd fraction, since 45 × 49 = 2205,
30/45 = 30 × 49/45 × 49 = 1470/2205 - Subtract the two like fractions:
1890/2205 - 1470/2205 = 1890 - 1470/2205 = 420/2205 - After reducing the fraction, the answer is 4/21
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