Answers

Subtract 12/72 from 3/90

3/90 - 12/72 is -2/15.

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,
   3/90 = 3 × 4/90 × 4 = 12/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   12/72 = 12 × 5/72 × 5 = 60/360
4. Subtract the two like fractions:
   12/360 - 60/360 = 12 - 60/360 = -48/360
5. After reducing the fraction, the answer is -2/15

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