Answer:
asked-how many items did he answered correctly?
given-80% and 20 items
solution-change 20 items to 100% then subtract it to 80%.100%-80%=20% so the meaning of 20% is 5 items wrong so change again 100% to 20 items then 20% to 5 wrong answers.20-5= 15
Answer-15 items
Step-by-step explanation:
correct me if im wrong
