Answers

Subtract 75/70 from 1/20

1^st number: 1/20, 2^nd number: 1 5/70

1/20 - 75/70 is -143/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 70 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   1/20 = 1 × 7/20 × 7 = 7/140
3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
   75/70 = 75 × 2/70 × 2 = 150/140
4. Subtract the two like fractions:
   7/140 - 150/140 = 7 - 150/140 = -143/140

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