When he did the math problem, he divided a number by 5 and regarded it as a multiplication of 5. As a result, the answer he got was 15 / 16, and the correct result was () Remember to write the formula!

15/16 ÷5 ÷ 5 = 3/80
The correct result is (3 out of 80)

The result is different from the correct answer ()

60.

What is the difference between his calculation result and the correct one?

17/A +0.3 -17/(A+0.3)
=[17/A(A+0.3)][A+0.3-A]+0.3
=5.1/[A(A+0.3)]+0.3
=(3A^2 +9A +51)/(10A^2 +3A)

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