A students Tesco improved from 70% to 85%. What is the approximate percent increase in the student score

The percent increase in the student's score can be calculated by finding the difference between the initial score and the final score, dividing it by the initial score, and then multiplying by 100.

Initial score = 70%
Final score = 85%

Percent increase = ((85 - 70) / 70) * 100
Percent increase = (15 / 70) * 100

Percent increase = 21.43%

Therefore, the approximate percent increase in the student's score is 21.43%.