Answers

Subtract 9/40 from 90/70

1^st number: 1 20/70, 2^nd number: 9/40

90/70 - 9/40 is 297/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 70 × 4 = 280,
   90/70 = 90 × 4/70 × 4 = 360/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   9/40 = 9 × 7/40 × 7 = 63/280
4. Subtract the two like fractions:
   360/280 - 63/280 = 360 - 63/280 = 297/280
5. In mixed form: 117/280

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