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To be correct, you must look at the THIRD decimal and increase the second decimal by 1 up only if the third decimal is 5 or higher. Leave the second decimal as is when the third decimal is 4 or lower.

Examples:
12.28 = 12.28 because it was already expressed as 2 decimals.
12.284 = 12.28 (4 or less)
12.285 = 12.29
12.289 = 12.29

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9y ago

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