Subtract 30/32 from 21/84
21/84 - 30/32 is -11/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 84 × 8 = 672,
21/84 = 21 × 8/84 × 8 = 168/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
30/32 = 30 × 21/32 × 21 = 630/672 - Subtract the two like fractions:
168/672 - 630/672 = 168 - 630/672 = -462/672 - After reducing the fraction, the answer is -11/16
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