five.
90 ÷ -5 = -18
450 / 5 = 90
450 is divisible by ("can be divided by") five because five goes evenly into 450: 450 / 5 = 90
90
No. Prime numbers are numbers that can only be divided evenly by themselves or one. 90 can be divided by ten, five, nine, two, forty-five, eighteen, three, thirty, six, and fifteen.
(-5/9) divided by (1/18) = (-5/9) x (18) = -90/9 = -10
6.6667
45 divided into 90 = 0.5
800 divided 90 = 8.88888888888889
90
2.7778