Since this is rounding to the hundred thousands place, look at the second number to the right. Any number 5 and above would round up while 4 and below round down.
429,455 would round down to 400,000 because the second number is 2
441,688 would also round down to 400,000 since the next number is 4
550,193 would round up to 600,000 which is too high.
So that leaves C. 533,736 to round down to 500,000 since the ten thousands place is 3.
