Subtract 30/35 from 3/72, Solve 3/72

Subtract 30/35 from 3/72

3/72 - 30/35 is -137/168.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 35 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 72 × 35 = 2520,
3/72 = 3 × 35/72 × 35 = 105/2520
Likewise, for the 2nd fraction, since 35 × 72 = 2520,
30/35 = 30 × 72/35 × 72 = 2160/2520
Subtract the two like fractions:
105/2520 - 2160/2520 = 105 - 2160/2520 = -2055/2520
After reducing the fraction, the answer is -137/168

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