80% and I was not a good chemistry student, but I can remember just about anything and I can take tests well. Mainly I was just not well behaved student in the class, I got kicked out of this particular class quite often which bothered my grade in the class, but I could do well on most of the tests which at one point the teacher thought I was cheating.... He later read the next test to me with the principal observing and I aced it. The teacher really did not like me which in the end worked in my favor in the dispute between my parents, the principal, teacher and myself as to why I was often kicked out of class. In the end my dad knew I was a total turd but couldn't convince the principal of this fact so I paid for it at home. My job, actual income producing job at the time in high school, was firewood cutting and as payment to my dad for use of the farm and his saw I kept the house stocked, my punishment over this class was using a crosscut saw till I fessed up or convinced my dad the teacher was out to get me. It took about a week.