What is 1+1 * the square root of 199 and 198

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

I’m still confused on how to work the percentages

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3