Subtract 30/7 from 40/10
1st number: 4 0/10, 2nd number: 4 2/7
40/10 - 30/7 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
40/10 = 40 × 7/10 × 7 = 280/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
30/7 = 30 × 10/7 × 10 = 300/70 - Subtract the two like fractions:
280/70 - 300/70 = 280 - 300/70 = -20/70 - After reducing the fraction, the answer is -2/7
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