Subtract 25/7 from 21/45
1st number: 21/45, 2nd number: 3 4/7
21/45 - 25/7 is -326/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
25/7 = 25 × 45/7 × 45 = 1125/315 - Subtract the two like fractions:
147/315 - 1125/315 = 147 - 1125/315 = -978/315 - After reducing the fraction, the answer is -326/105
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