Whick error did she do and what the correct answer

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

5x−4≥12 or 12x+5≤−4 can you with this problem