Answer:
Multiplier = 0.65
Value at the end of the year = 7,800 monetary units
Explanation:
If his car decreased in value by 35%, in order to find the value of his car at the end of last year, multiply the original value by (1 - 35%) or:

The multiplier that should be used is 0.65.
The value of Ahmed's car at the end of last year was:

The car was worth 7,800 monetary units at the end of last year.