Compare. use < ,> ,or = a. 50%of % of 30 b. 75% of % of 20

For clarification, < is less than, > is greater than, and then there is =.

A. So you have to take the percent of each number first.
     
     50% of 20 = 0.5 x 20 = 10

     40% of 30 = 0.4 x 30 = 12

Then put in the appropriate sign.

     10 < 12

B.  75% of 12 = 0.75 x 12 = 9

     30% of 20 = 0.3 x 20 = 6

     9 > 6