Subtract 27/30 from 28/32
28/32 - 27/30 is -1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 30 is 480
Next, find the equivalent fraction of both fractional numbers with denominator 480 - For the 1st fraction, since 32 × 15 = 480,
28/32 = 28 × 15/32 × 15 = 420/480 - Likewise, for the 2nd fraction, since 30 × 16 = 480,
27/30 = 27 × 16/30 × 16 = 432/480 - Subtract the two like fractions:
420/480 - 432/480 = 420 - 432/480 = -12/480 - After reducing the fraction, the answer is -1/40
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