Answer:
77%
Step-by-step explanation:
30 was 100%
23 is x%
x=23*100/30 = 76.666.. rounded to 77%
23 divided by 30 is 0.766666, which percent-wise is rounded to 77% :)
yes
just one line is going to be longer
It would be 3h(3h^2 -4), it is factored