7^(-5) = 1/7^(5) = 1/16807
0.000063 =======
.0001
0.0000252
0.2 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is 2/10. You can simplify this rational fraction if you so wish.
490,000.
15 to the negative 5th power as a fraction can also be written as 1/15 to the 5th power.
0.000063 =======
Four to the negative 5th power equals 0.0009765625
Seven to the negative 5th power is 0.00005949901
1/-25
1/5th
.0001
-0.00003
0.000089
0.000049
The same as 42 to the power of 5 but negative
0.000039