510
0.0196
510
30
510
102
170
510
7.8843
Well, isn't that a happy little question! When we round 510 to the nearest 10, we look at the digit in the tens place, which is 1. Since 1 is closer to 0 than 10, we round down to 510. Just imagine that number nestled comfortably in its new rounded home!
85
(10/100)*510=51