Question

-0.15 is higher lesser or equal to -0.3???

Answer 1

In negative numbers, a "lower" value, closer to zero, is greater.

Answer 2

So which of those has the largest value?

Answer 3

-0.3???

Answer 4

Think about it:

How far below zero do you have to go to reach -0.15? Only 0.15 units. To reach -0.3 you have to go 0.3 units. So, you have to go further negatively to get to 0.3, which means you are actually getting smaller.

So -0.15, because you are going less "negatively", is bigger.