Subtract 25/45 from 28/21
1st number: 1 7/21, 2nd number: 25/45
28/21 - 25/45 is 7/9.
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,
25/45 = 25 × 7/45 × 7 = 175/315 - Subtract the two like fractions:
420/315 - 175/315 = 420 - 175/315 = 245/315 - After reducing the fraction, the answer is 7/9
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