Answers

Subtract 21/30 from 50/90

50/90 - 21/30 is -13/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 30 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   50/90 = 50 × 1/90 × 1 = 50/90
3. Likewise, for the 2nd fraction, since 30 × 3 = 90,
   21/30 = 21 × 3/30 × 3 = 63/90
4. Subtract the two like fractions:
   50/90 - 63/90 = 50 - 63/90 = -13/90

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