Percentage error is the error result minus the correct result, divided by the correct result and multiplied by 100. Let the original number be x.

Error = 100((3x/2)-(3x/2))/(3x/2)

= 100(0)/(3x/2)

= 0/(3x/2)

= 0%

The error percentage is zero because dividing by 2/3 is the same as multiplying by 3/2. The student did not make an error.

Error = 100((3x/2)-(3x/2))/(3x/2)

= 100(0)/(3x/2)

= 0/(3x/2)

= 0%

The error percentage is zero because dividing by 2/3 is the same as multiplying by 3/2. The student did not make an error.