Answers

Subtract 70/72 from 30/50

30/50 - 70/72 is -67/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 72 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 50 × 36 = 1800,
   30/50 = 30 × 36/50 × 36 = 1080/1800
3. Likewise, for the 2nd fraction, since 72 × 25 = 1800,
   70/72 = 70 × 25/72 × 25 = 1750/1800
4. Subtract the two like fractions:
   1080/1800 - 1750/1800 = 1080 - 1750/1800 = -670/1800
5. After reducing the fraction, the answer is -67/180

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