When you have a non-periodic decimal number, you can write it as a fraction. The numerator is the whole number, without the decimal separator. The denominator is a power of 10, 10^k, where k is the number of decimal digits.
So, you have
Since you only have one decimal digit.
-6 is an integer, and any integer can be written as a fraction with denominator 1:
The percentage symbol simply means "divided by 100":
-4/11 is already a fraction between integers, so it's already in the requested form.
-4.3 work like 0.7: