686.98 rounded to the nearest whole number is 687. When rounding a decimal number to the nearest whole number, you look at the digit immediately to the right of the decimal point. If that digit is 5 or greater, you round the whole number up by 1. In this case, the digit to the right of the decimal point is 9, so we round 686.98 up to 687.
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It is 3 when rounded to the nearest whole number
It is 1 when rounded to the nearest whole number
It is 16 when rounded to the nearest whole number
It is 63 rounded to the nearest whole number
It is 30 when rounded to the nearest whole number