Final answer:
The error is in option b, where 135% x 40 is incorrectly stated as equaling 5. The correct computation shows that 135% of 40 is equal to 54.
Step-by-step explanation:
To find the error in calculating 135% of 40, we need to convert the percentage to a decimal and then multiply it by the number. The correct calculation is as follows:
- Convert 135% to a decimal, which gives 1.35.
- Multiply 1.35 by 40.
- The result is 54.
Option a, where 0.125 is multiplied by 40, is irrelevant to the problem at hand.
Regarding option b, 135% x 40 = 5 is incorrect because when the correct calculation is performed, as shown above, the result is 54, not 5.
Option c is correct as it correctly states that 135% of 40 is 54.
Option d, which claims there is no error in the expression, is incorrect because option b indeed contains an error.
Thus, the statement with an error is option b.