Answers

Subtract 7/40 from 4/90

4/90 - 7/40 is -47/360.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 90 × 4 = 360,
   4/90 = 4 × 4/90 × 4 = 16/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   7/40 = 7 × 9/40 × 9 = 63/360
4. Subtract the two like fractions:
   16/360 - 63/360 = 16 - 63/360 = -47/360

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