Subtract 6/21 from 21/45
21/45 - 6/21 is 19/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 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 21 × 15 = 315,
6/21 = 6 × 15/21 × 15 = 90/315 - Subtract the two like fractions:
147/315 - 90/315 = 147 - 90/315 = 57/315 - After reducing the fraction, the answer is 19/105
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