Answers

Subtract 84/72 from 1/90

1^st number: 1/90, 2^nd number: 1 12/72

1/90 - 84/72 is -52/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 90 × 4 = 360,
   1/90 = 1 × 4/90 × 4 = 4/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   84/72 = 84 × 5/72 × 5 = 420/360
4. Subtract the two like fractions:
   4/360 - 420/360 = 4 - 420/360 = -416/360
5. After reducing the fraction, the answer is -52/45

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