It depends on the degree of rounding.
To the nearest whole number, it is 420.
To the nearest thousand, it is 0.
rounded to the nearest ten... it would be 420.
It is the same distance from both values, but mathematically it is rounded up to 430.
420
The answer is 80,000
It is: 420-10 = 410
rounded to the nearest ten... it would be 420.
420
420
420
420
420
420
420
420
420
It is: 206/420 times 100 = 49% rounded
420