Convert and Reduce Decimal: Simplifying 0.8400 to Its Fraction Form

Decimal Simplification with Trailing Zeros

Reduce the following fraction:

0.8400 0.8400

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Reduce the following fraction:

0.8400 0.8400

2

Step-by-step solution

To reduce the decimal fraction 0.8400 0.8400 , we eliminate the trailing zeros. Thus, 0.8400 0.8400 becomes 0.84 0.84 . As a result, the reduced fraction is 0.84 0.84 .

3

Final Answer

0.84 0.84

Key Points to Remember

Essential concepts to master this topic
  • Rule: Trailing zeros after decimal point don't change value
  • Technique: Remove zeros from right: 0.8400 0.8400 becomes 0.84 0.84
  • Check: Verify both decimals equal same value: 0.8400=0.84 0.8400 = 0.84

Common Mistakes

Avoid these frequent errors
  • Removing zeros from the wrong position
    Don't remove zeros between digits or before the decimal point = changes the value completely! For example, 0.8040 ≠ 0.84. Always remove only trailing zeros that come after all significant digits to the right of the decimal point.

Practice Quiz

Test your knowledge with interactive questions

Reduce the following fraction:

\( 0.30 \)

FAQ

Everything you need to know about this question

What exactly are trailing zeros?

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Trailing zeros are zeros that come at the end of a decimal number, after all the significant digits. In 0.8400 0.8400 , the two zeros at the end are trailing zeros.

Why can I remove trailing zeros?

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Trailing zeros don't change the value of a decimal! Think of money: 0.84and0.84 and 0.8400 both mean 84 cents. The extra zeros are just placeholder digits.

Can I remove zeros anywhere in a decimal?

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No! Only remove zeros at the very end. In 0.8040 0.8040 , you cannot remove the middle zero because it's significant - it shows the value is 8040 thousandths, not 840 thousandths.

What's the difference between 0.84 and 0.840?

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They represent the same value but with different precision. 0.84 0.84 shows hundredths place accuracy, while 0.840 0.840 shows thousandths place accuracy.

How do I know when a decimal is fully simplified?

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A decimal is simplified when it has no trailing zeros. The last digit should be non-zero, showing only the significant digits needed to represent the value.

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