Subtract 21/32 from 28/90
28/90 - 21/32 is -497/1440.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 32 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 90 × 16 = 1440,
28/90 = 28 × 16/90 × 16 = 448/1440 - Likewise, for the 2nd fraction, since 32 × 45 = 1440,
21/32 = 21 × 45/32 × 45 = 945/1440 - Subtract the two like fractions:
448/1440 - 945/1440 = 448 - 945/1440 = -497/1440
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