Subtract 25/35 from 21/45
21/45 - 25/35 is -26/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 35 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 35 × 9 = 315,
25/35 = 25 × 9/35 × 9 = 225/315 - Subtract the two like fractions:
147/315 - 225/315 = 147 - 225/315 = -78/315 - After reducing the fraction, the answer is -26/105
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