Answer:
0.3 multiplied m
Explanation:
Given : An algebraic expression 30% of m.
To find : Write an algebraic expression for the word phrase ?
Solution :
30% = 30 percent i.e.

'of' = multiplication (symbol ×)
m = variable or number m
So, 30% of m is 30% multiplied by m
or

In word phrase - 0.3 multiplied m