we are given 
0.25×4÷(-1/5)×6÷(-10)
we can use 
PEMDAS rule 
P: parenthesis
E: Exponents 
M: multiplication 
D: division 
A: addition 
S: subtraction 
Firstly , we will solve inside parenthesis
0.25×4÷(-0.2)×6÷(-10)
now, we can multiply
1÷(-1.2)÷(-10)
now, we can do division 
and we get 
1÷(-1.2)÷(-10)

 .........Answer
.........Answer