Answers

Subtract 70/10 from 42/72

1^st number: 42/72, 2^nd number: 7 0/10

42/72 - 70/10 is -77/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 10 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   42/72 = 42 × 5/72 × 5 = 210/360
3. Likewise, for the 2nd fraction, since 10 × 36 = 360,
   70/10 = 70 × 36/10 × 36 = 2520/360
4. Subtract the two like fractions:
   210/360 - 2520/360 = 210 - 2520/360 = -2310/360
5. After reducing the fraction, the answer is -77/12

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