Answers

Subtract 12/72 from 7/90

7/90 - 12/72 is -4/45.

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,
   7/90 = 7 × 4/90 × 4 = 28/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   12/72 = 12 × 5/72 × 5 = 60/360
4. Subtract the two like fractions:
   28/360 - 60/360 = 28 - 60/360 = -32/360
5. After reducing the fraction, the answer is -4/45

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