What is least to greatest with these following numbers? - 0.615,-5/8,-0.62

First, you need to convert them all to the same type of number. This means converting - 5/8 to a decimal. When divided, - 5/8 equals - 0.625.

So in order from least to greatest is - 5/8, - 0.62, - 0.615

You might think that this is backwards, but it is not, because if you have a large negative number it has less value then a lower negative number.