Round 0.666 to 10 Decimal Places

Rounding simplifies a number while keeping it close to the original value.

The rule: Look at the digit to the RIGHT of where you're rounding.

• If it's 5 or greater: round UP (increase the digit)

• If it's less than 5: round DOWN (keep the digit the same)

We want to round 0.666 to the 10 decimal places.

The deciding digit (the one to the right of our rounding position) is: 0

The deciding digit is 0.

Since 0 is less than 5, we round DOWN.

0.666 rounded to 10 decimal places = 0.666

Original number: 0.666

Rounded result: 0.666

The difference is 0.0000000000, which confirms our rounding is correct.

The rounded value is as close as possible to the original while having only 10 decimal places.