I WILL GIVE 10 POINTS AND BRAINLIEST PLEASE ANSWER. ONLY ANSWER A B C I

Step-by-step explanation:

"L is the sum of a and b"

"K is the sum of a and b, then divided by 2"

"M is the product of 3 and d"

"A is the sum of a, b and c, then divided by 3"

63 %

Step-by-step explanation:

Percentage change in value value for any number is given by

percentage change = (new value - old value) /old value * 100

we can also write it as

percentage change = (change in value ) /old value * 100

cost of commercial in 1968 = $54000

cost of commercial in 1973 = $88000

change in cost of commercial = cost of commercial in 1973 - cost of commercial in 1973  = $(88000-54000) = $34000

thus,

percentage change in cost of commercial

         = change in cost of commercial/cost of commercial in 1968 * 100

         = 34000/54000*100 = 62.96 %

Thus, percentage change in cost of commercial is 62.96 %

we have to round it to nearest whole number

rounded value of 62.96 is 63

in that case

percentage change in cost of commercial is 63 %