Ahh someone help its urgently needed now

Question

Jennifer left her house at 6:45 am. It took her 8 minutes 45 seconds to walk to the bus stop. She waited 3 3/4 minutes for the bus and then rode the bus 7 1/2 minutes to her school. At what time did she arrive at school?

Answer 1

At first she got 8 min and 45 sec

after that, 3/4 of 60 sec is 45 sec and 1/2 is 30 sec.

So, she got more 3 min and 45 sec plus 7 min and 30 sec.

6 h and 45 min + 8 min and 45 sec + 3 min and 45 sec + 7 min and 30 sec = 7h and 05 min.

So, she arrived at school by 7:05 am.

Answer 2

8.75 + 3.75 + 7.5 = 20 minutes

She arrived at school 20 minutes after leaving her house, that is at 7:05 am.