Answer:
A.)
Step-by-step explanation:
A.)
I need a little bit more detail in order to answer your question properly
As a fraction is 345 over 10000 and in simplest form divide both by 5
that 69 over 2000. As percentage move two decimal place to the right, so it is %34.5
The answers would be -8 and 18
-8×18 = -144
-8+18 = 18-8 = 10