Answers

Subtract 42/24 from 20/70

1^st number: 20/70, 2^nd number: 1 18/24

20/70 - 42/24 is -41/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 24 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 70 × 12 = 840,
   20/70 = 20 × 12/70 × 12 = 240/840
3. Likewise, for the 2nd fraction, since 24 × 35 = 840,
   42/24 = 42 × 35/24 × 35 = 1470/840
4. Subtract the two like fractions:
   240/840 - 1470/840 = 240 - 1470/840 = -1230/840
5. After reducing the fraction, the answer is -41/28

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