I've found that my students used A and B differently in terms of number and accuracy. They used A 103 times and B 88 times. 54 times was correct in A and 38 times in B. This means that 49 times was wrong in A and 50 times in B. I want to know the percentages of correctness in A and in B. Please give me step-by-step advice on this problem. Thank you.