Subtract 28/32 from 21/45
21/45 - 28/32 is -49/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 32 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 45 × 32 = 1440,
21/45 = 21 × 32/45 × 32 = 672/1440 - Likewise, for the 2nd fraction, since 32 × 45 = 1440,
28/32 = 28 × 45/32 × 45 = 1260/1440 - Subtract the two like fractions:
672/1440 - 1260/1440 = 672 - 1260/1440 = -588/1440 - After reducing the fraction, the answer is -49/120
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