Answers

Subtract 42/40 from 7/70

1^st number: 7/70, 2^nd number: 1 2/40

7/70 - 42/40 is -19/20.

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,
   7/70 = 7 × 4/70 × 4 = 28/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   42/40 = 42 × 7/40 × 7 = 294/280
4. Subtract the two like fractions:
   28/280 - 294/280 = 28 - 294/280 = -266/280
5. After reducing the fraction, the answer is -19/20

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