Answers

Subtract 40/50 from 50/72

50/72 - 40/50 is -19/180.

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,
   50/72 = 50 × 25/72 × 25 = 1250/1800
3. Likewise, for the 2nd fraction, since 50 × 36 = 1800,
   40/50 = 40 × 36/50 × 36 = 1440/1800
4. Subtract the two like fractions:
   1250/1800 - 1440/1800 = 1250 - 1440/1800 = -190/1800
5. After reducing the fraction, the answer is -19/180

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