Subtract 40/21 from 10/30
1st number: 10/30, 2nd number: 1 19/21
10/30 - 40/21 is -11/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
10/30 = 10 × 7/30 × 7 = 70/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
40/21 = 40 × 10/21 × 10 = 400/210 - Subtract the two like fractions:
70/210 - 400/210 = 70 - 400/210 = -330/210 - After reducing the fraction, the answer is -11/7
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