That depends with what precision you want to round it. When rounded to the nearest whole number, the answer is 267. If rounded to the nearest 10, it is 270. If rounded to the nearest hundred, 300. If rounded to the nearest thousand, the answer is zero.
270
.2673
267.00
8
300
503.8 rounded to the nearest whole number is 504
76
3
It is 63 rounded to the nearest whole number
5
It is 1 rounded to the nearest whole number