Answers

Subtract 12/72 from 90/50

1^st number: 1 40/50, 2^nd number: 12/72

90/50 - 12/72 is 49/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 72 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 50 × 36 = 1800,
   90/50 = 90 × 36/50 × 36 = 3240/1800
3. Likewise, for the 2nd fraction, since 72 × 25 = 1800,
   12/72 = 12 × 25/72 × 25 = 300/1800
4. Subtract the two like fractions:
   3240/1800 - 300/1800 = 3240 - 300/1800 = 2940/1800
5. After reducing the fraction, the answer is 49/30
6. In mixed form: 119/30

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