Answers

Subtract 16/90 from 7/40

7/40 - 16/90 is -1/360.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   7/40 = 7 × 9/40 × 9 = 63/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   16/90 = 16 × 4/90 × 4 = 64/360
4. Subtract the two like fractions:
   63/360 - 64/360 = 63 - 64/360 = -1/360

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