Answers

Subtract 42/90 from 20/9

1^st number: 2 2/9, 2^nd number: 42/90

20/9 - 42/90 is 79/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 9 × 10 = 90,
   20/9 = 20 × 10/9 × 10 = 200/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   42/90 = 42 × 1/90 × 1 = 42/90
4. Subtract the two like fractions:
   200/90 - 42/90 = 200 - 42/90 = 158/90
5. After reducing the fraction, the answer is 79/45
6. In mixed form: 134/45

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