420 = 400 + 20
others are
310 = 400 - 90
530 = 400 +130
460 = 400 + 60
370 = 400 - 30
so as 20 is smallest the answer is 420
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17 x 22 = 374 To the nearest hundred: 400 To the nearest ten: 370 To the nearest one: 374
350 to 449 -- 100 numbers
310/400 x 100 = 77.5 percent.
350 to 449
77.5%.