SOLUTION: Alfred obtained a mark of 50% in his half yearly exam. He decided to go to private tuition with the hope of doing better in the annual exams. Alfred was rewarded because his mark w

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts  -> Lessons -> SOLUTION: Alfred obtained a mark of 50% in his half yearly exam. He decided to go to private tuition with the hope of doing better in the annual exams. Alfred was rewarded because his mark w      Log On


   

Question 889327: Alfred obtained a mark of 50% in his half yearly exam. He decided to go to private tuition with the hope of doing better in the annual exams. Alfred was rewarded because his mark went up to 70%. Find the percentage increase.
Answer by LinnW(1048) About Me  (Show Source):
You can put this solution on YOUR website!
70/50 - 1 = 140/100 - 1
1.40 - 1 = .40
So the increase is 40 percent