Answers

Subtract 42/6 from 1/90

1^st number: 1/90, 2^nd number: 7 0/6

1/90 - 42/6 is -629/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 6 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   1/90 = 1 × 1/90 × 1 = 1/90
3. Likewise, for the 2nd fraction, since 6 × 15 = 90,
   42/6 = 42 × 15/6 × 15 = 630/90
4. Subtract the two like fractions:
   1/90 - 630/90 = 1 - 630/90 = -629/90

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