Subtract 30/45 from 4/7
4/7 - 30/45 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
4/7 = 4 × 45/7 × 45 = 180/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
30/45 = 30 × 7/45 × 7 = 210/315 - Subtract the two like fractions:
180/315 - 210/315 = 180 - 210/315 = -30/315 - After reducing the fraction, the answer is -2/21
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