Subtract 30/45 from 40/21
1st number: 1 19/21, 2nd number: 30/45
40/21 - 30/45 is 26/21.
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,
40/21 = 40 × 15/21 × 15 = 600/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
30/45 = 30 × 7/45 × 7 = 210/315 - Subtract the two like fractions:
600/315 - 210/315 = 600 - 210/315 = 390/315 - After reducing the fraction, the answer is 26/21
- In mixed form: 15/21
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