Subtract 30/48 from 40/70
40/70 - 30/48 is -3/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 48 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 70 × 24 = 1680,
40/70 = 40 × 24/70 × 24 = 960/1680 - Likewise, for the 2nd fraction, since 48 × 35 = 1680,
30/48 = 30 × 35/48 × 35 = 1050/1680 - Subtract the two like fractions:
960/1680 - 1050/1680 = 960 - 1050/1680 = -90/1680 - After reducing the fraction, the answer is -3/56
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