Subtract 21/9 from 28/45
1st number: 28/45, 2nd number: 2 3/9
28/45 - 21/9 is -77/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
28/45 = 28 × 1/45 × 1 = 28/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Subtract the two like fractions:
28/45 - 105/45 = 28 - 105/45 = -77/45
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