Answers

Subtract 7/90 from 81/30

1^st number: 2 21/30, 2^nd number: 7/90

81/30 - 7/90 is 118/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 30 × 3 = 90,
   81/30 = 81 × 3/30 × 3 = 243/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   7/90 = 7 × 1/90 × 1 = 7/90
4. Subtract the two like fractions:
   243/90 - 7/90 = 243 - 7/90 = 236/90
5. After reducing the fraction, the answer is 118/45
6. In mixed form: 228/45

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