Subtract 5/45 from 28/21
1st number: 1 7/21, 2nd number: 5/45
28/21 - 5/45 is 11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
28/21 = 28 × 15/21 × 15 = 420/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
5/45 = 5 × 7/45 × 7 = 35/315 - Subtract the two like fractions:
420/315 - 35/315 = 420 - 35/315 = 385/315 - After reducing the fraction, the answer is 11/9
- In mixed form: 12/9
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