Answers

Subtract 15/81 from 7/5

1^st number: 1 2/5, 2^nd number: 15/81

7/5 - 15/81 is 164/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   7/5 = 7 × 81/5 × 81 = 567/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   15/81 = 15 × 5/81 × 5 = 75/405
4. Subtract the two like fractions:
   567/405 - 75/405 = 567 - 75/405 = 492/405
5. After reducing the fraction, the answer is 164/135
6. In mixed form: 129/135

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