Answers

Subtract 70/54 from 21/30

1^st number: 21/30, 2^nd number: 1 16/54

21/30 - 70/54 is -161/270.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 54 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 30 × 9 = 270,
   21/30 = 21 × 9/30 × 9 = 189/270
3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
   70/54 = 70 × 5/54 × 5 = 350/270
4. Subtract the two like fractions:
   189/270 - 350/270 = 189 - 350/270 = -161/270

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