Answers

Subtract 90/72 from 30/20

1^st number: 1 10/20, 2^nd number: 1 18/72

30/20 - 90/72 is 1/4.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 20 × 18 = 360,
   30/20 = 30 × 18/20 × 18 = 540/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   90/72 = 90 × 5/72 × 5 = 450/360
4. Subtract the two like fractions:
   540/360 - 450/360 = 540 - 450/360 = 90/360
5. After reducing the fraction, the answer is 1/4

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