Answers

Subtract 1/90 from 84/72

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

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

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   84/72 = 84 × 5/72 × 5 = 420/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   1/90 = 1 × 4/90 × 4 = 4/360
4. Subtract the two like fractions:
   420/360 - 4/360 = 420 - 4/360 = 416/360
5. After reducing the fraction, the answer is 52/45
6. In mixed form: 17/45

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