Is 0.62 greater than 0.82

No, 0.82 is greater.
Look at place values, once you line up the decimals, you will see that the 6 and 8 are in the same plce value, therefore just figure out which number is bigger, the 6 or 8? The answer is 8! So, you now know that .82 is greater than .62
~hope this helped :)