Is 70 greater or less than .007?

YES!!!!

To compare decimals, bring both number to the same number of decimal places, three in this case, by inserting suffix zeroes.

Hence

70 & 0.007 becomes

70.000 & 0.007

Drop the decimal point

70000 & 0007

Drop the prefix zeroes

70000 & 7

I think you will agree that 70000 > 7 . Hence it follows that 70 > 0.007