Mikel creates the table below to help her determine 40% of 70. She writes the expression Which change in Mikel’s expression will lead her to the correct answer?

Answer:

• The 0.2 in the expression could be changed to 2

Step-by-step explanation:

Each column of the table represents:

• 20% = 0.2 = 14

To determine 40% the expression should be:

• 2*20% = 2*14

So the correct answer choice is the last one:

• The 0.2 in the expression could be changed to 2

The change in the expression to get the correct answer is option B. Mikel should changes the 0.2 in her expression to 0.4.The correct expression for 40% of 70 is (0.4)(70) = 28.

Mikel's expression is (0.2)(14) = 2.8.

The only change that needs to be made to Mikel's expression is to change the 0.2 to 0.4.

This is because 40% is equivalent to 0.4.

So the answer is to change the 0.2 in Mikel's expression to 0.4.

Here is a breakdown of the calculation:

40% of 70

= 40/100 × 70

= 28

(0.2)(14)

= 0.2 × 14

= 2.8

As it can be seen, the only difference between the two expressions is the value of the first factor.

In the correct expression, the first factor is 0.4, while in Mikel's expression, the first factor is 0.2.

Therefore, if Mikel changes the 0.2 in her expression to 0.4, then her expression will be correct.

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