James must have received 58.3% in Exam 1
James got 70% in the second exam and this is an improvement of 20% from the first exam.
Assume the first exam's score is x, the expression would be:
x + (x × 20%) = 70%
Solving this expression would give:
x + (x × 20%) = 70%
x + 0.2x = 70%
1.2x = 70%
x = 70% / 1.2
= 58.3%
James therefore scored 58.3% in the first exam.
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