Subtract 21/64 from 3/90
3/90 - 21/64 is -283/960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 90 × 32 = 2880,
3/90 = 3 × 32/90 × 32 = 96/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
21/64 = 21 × 45/64 × 45 = 945/2880 - Subtract the two like fractions:
96/2880 - 945/2880 = 96 - 945/2880 = -849/2880 - After reducing the fraction, the answer is -283/960
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