Subtract 9/12 from 15/42
1542 - 912 is -1128.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
1542 = 15 × 242 × 2 = 3084 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
912 = 9 × 712 × 7 = 6384 - Subtract the two like fractions:
3084 - 6384 = 30 - 6384 = -3384 - After reducing the fraction, the answer is -1128
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