It was greater than 1/2 because in order for a number to increase value, it has to be multiplied by a number greater than 1.
Hope this helps!
4 * 1,000,000,000 = 4,000,000,000
5 * 1,000,000 = 5,000,000
9 * 10,000 = 90,000
8 * 100 = 800
7 * 1 = 7
put it all together
4,005,090,807
Option D.)
Hope this helps