Subtract 21/45 from 16/56
16/56 - 21/45 is -19/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 45 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
16/56 = 16 × 45/56 × 45 = 720/2520 - Likewise, for the 2nd fraction, since 45 × 56 = 2520,
21/45 = 21 × 56/45 × 56 = 1176/2520 - Subtract the two like fractions:
720/2520 - 1176/2520 = 720 - 1176/2520 = -456/2520 - After reducing the fraction, the answer is -19/105
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