Answers

Subtract 90/50 from 4/72

1^st number: 4/72, 2^nd number: 1 40/50

4/72 - 90/50 is -157/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 50 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 72 × 25 = 1800,
   4/72 = 4 × 25/72 × 25 = 100/1800
3. Likewise, for the 2nd fraction, since 50 × 36 = 1800,
   90/50 = 90 × 36/50 × 36 = 3240/1800
4. Subtract the two like fractions:
   100/1800 - 3240/1800 = 100 - 3240/1800 = -3140/1800
5. After reducing the fraction, the answer is -157/90

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