In a survey, 2 out of 8 students named math as their favorite subject. express the rate as a decimal and as a percent.

0.25 and 25%

Step-by-step explanation:

2/8 is equal to 1/4. 1/4 is the same as 0.25. Move decimal point two spots to the right and BOOM you get 25%.

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let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.