If a strand of DNA has 10% G,
A:
C:
T:

C would be the corresponding 10%

that leaves 80% remaining so that would be split ~ equally between the remaining 2 base pairs so

40% A and

40% T

Explanation:

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.