To find 160% of 40, we can convert the percentage to a decimal and multiply:
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Convert 160% to a decimal: \( 160% = \frac{160}{100} = 1.6 \)
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Multiply by 40: \( 1.6 \times 40 = 64 \)
Now let's evaluate each student's work:
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Cam's work: \( 16 \times 40 = 640 \). This is incorrect as he mistakenly calculated \( 16 \) instead of \( 1.6 \).
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Gitana's work: \( 1.6 \times 40 = 64 \) (but she wrote \( 00.00 + 640 = 64.0 \)). The calculation is correct but the additional 640 is wrong. The final answer is incorrect as written.
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Naoko's work: \( 0.16 \times 40 = 6.4 \) (but this is incorrect as 0.16 is not the right decimal). This is not the correct approach since he did not convert the percentage correctly.
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Sanjay's work: \( 160 \times 40 = 6400 \). Sanjay multiplied 160 instead of converting it to a decimal.
None of the students reached the correct final answer of 64. The closest correct calculation belongs to Gitana, but her presentation of the answer was incorrect.
Final Correct Calculation: 160% of 40 is indeed 64.
None of the students' calculations were fully correct as explained.
1 answer