The following table demonstrates the relation between interest rate, principal investment, and amount of interest. Fill in the missing entries with expressions or numbers.

Organize data with a table
Rate [math]Principal[math]Interest
Solution 1[math]% [math] [math]
Solution 2[math]% [math] 
Solution 3[math]% [math] 
Solution 4[math]% [math] 
Solution 5[math]% [math] 
Solution 6[math]% [math] 
Solution 7[math]% [math]