math help please!!!

In this question how do you know when to add or subtract?? Simplify
100^12/100^8

A.100^12/8
B.100^96
C.100^4
D.100^20

Is the answer C or D?? Thank you

asked by penny
  1. 100^12/100^8 = 100^12-8 = 100^?
    When you move the 100^8 from the denominator to the numerator, you change the sign of the exponent and 12-8 = 4.

    posted by DrBob222
  2. Thank you😳

    posted by penny
  3. DO you now understand?

    posted by Hamburger Helper

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