Answers

Subtract 72/80 from 40/36

1^st number: 1 4/36, 2^nd number: 72/80

40/36 - 72/80 is 19/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 36 × 20 = 720,
   40/36 = 40 × 20/36 × 20 = 800/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   72/80 = 72 × 9/80 × 9 = 648/720
4. Subtract the two like fractions:
   800/720 - 648/720 = 800 - 648/720 = 152/720
5. After reducing the fraction, the answer is 19/90

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