Serena bought a mattress that was on sale for `$390`.  The original price of the mattress was  `$750` . Answer the following questions:

1) What is the dollar amount of the discount? $

2) What is the discount rate as a percentage (rounded to nearest tenth)?

Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity

Box 2: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity