Subtract 12/30 from 40/21
1st number: 1 19/21, 2nd number: 12/30
40/21 - 12/30 is 158/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
40/21 = 40 × 10/21 × 10 = 400/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210 - Subtract the two like fractions:
400/210 - 84/210 = 400 - 84/210 = 316/210 - After reducing the fraction, the answer is 158/105
- In mixed form: 153/105
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