Answers

Subtract 75/18 from 70/20

1^st number: 3 10/20, 2^nd number: 4 3/18

70/20 - 75/18 is -2/3.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 18 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   70/20 = 70 × 9/20 × 9 = 630/180
3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
   75/18 = 75 × 10/18 × 10 = 750/180
4. Subtract the two like fractions:
   630/180 - 750/180 = 630 - 750/180 = -120/180
5. After reducing the fraction, the answer is -2/3

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