Answers

Subtract 70/50 from 70/72

1^st number: 70/72, 2^nd number: 1 20/50

70/72 - 70/50 is -77/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 50 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 72 × 25 = 1800,
   70/72 = 70 × 25/72 × 25 = 1750/1800
3. Likewise, for the 2nd fraction, since 50 × 36 = 1800,
   70/50 = 70 × 36/50 × 36 = 2520/1800
4. Subtract the two like fractions:
   1750/1800 - 2520/1800 = 1750 - 2520/1800 = -770/1800
5. After reducing the fraction, the answer is -77/180

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