I'm not really sure, because 650 marked down by 27% would be 474.5, which is close but not exact.
Hope I helped a little bit, sorry if I'm wrong.
Answer:

Step-by-step explanation:

Combine like terms, rewrite the equation and perform the operations between the coefficients,


Answer:
c
Step-by-step explanation:
0.1=1/10
1/10 is just the fraction form of 0.1
Answer:
8/21
Step-by-step explanation:
If you calculate 20^10/4^42 then you will find out it equals25