Answers

Subtract 20/54 from 72/70

1^st number: 1 2/70, 2^nd number: 20/54

72/70 - 20/54 is 622/945.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 54 is 1890
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1890
2. For the 1st fraction, since 70 × 27 = 1890,
   72/70 = 72 × 27/70 × 27 = 1944/1890
3. Likewise, for the 2nd fraction, since 54 × 35 = 1890,
   20/54 = 20 × 35/54 × 35 = 700/1890
4. Subtract the two like fractions:
   1944/1890 - 700/1890 = 1944 - 700/1890 = 1244/1890
5. After reducing the fraction, the answer is 622/945

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