Answers

Subtract 70/50 from 90/80

1^st number: 1 10/80, 2^nd number: 1 20/50

90/80 - 70/50 is -11/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 50 is 400
   
   Next, find the equivalent fraction of both fractional numbers with denominator 400
2. For the 1st fraction, since 80 × 5 = 400,
   90/80 = 90 × 5/80 × 5 = 450/400
3. Likewise, for the 2nd fraction, since 50 × 8 = 400,
   70/50 = 70 × 8/50 × 8 = 560/400
4. Subtract the two like fractions:
   450/400 - 560/400 = 450 - 560/400 = -110/400
5. After reducing the fraction, the answer is -11/40

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