Subtract 30/70 from 24/72
24/72 - 30/70 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
24/72 = 24 × 35/72 × 35 = 840/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
30/70 = 30 × 36/70 × 36 = 1080/2520 - Subtract the two like fractions:
840/2520 - 1080/2520 = 840 - 1080/2520 = -240/2520 - After reducing the fraction, the answer is -2/21
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