Answers

Subtract 7/72 from 42/40

1^st number: 1 2/40, 2^nd number: 7/72

42/40 - 7/72 is 343/360.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   42/40 = 42 × 9/40 × 9 = 378/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   7/72 = 7 × 5/72 × 5 = 35/360
4. Subtract the two like fractions:
   378/360 - 35/360 = 378 - 35/360 = 343/360

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