Subtract 30/4 from 8/21
1st number: 8/21, 2nd number: 7 2/4
8/21 - 30/4 is -299/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
8/21 = 8 × 4/21 × 4 = 32/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
30/4 = 30 × 21/4 × 21 = 630/84 - Subtract the two like fractions:
32/84 - 630/84 = 32 - 630/84 = -598/84 - After reducing the fraction, the answer is -299/42
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