Answers

Subtract 90/50 from 80/70

1^st number: 1 10/70, 2^nd number: 1 40/50

80/70 - 90/50 is -23/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 50 is 350
   
   Next, find the equivalent fraction of both fractional numbers with denominator 350
2. For the 1st fraction, since 70 × 5 = 350,
   80/70 = 80 × 5/70 × 5 = 400/350
3. Likewise, for the 2nd fraction, since 50 × 7 = 350,
   90/50 = 90 × 7/50 × 7 = 630/350
4. Subtract the two like fractions:
   400/350 - 630/350 = 400 - 630/350 = -230/350
5. After reducing the fraction, the answer is -23/35

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