This graph shows the math exam scores of a Massachusetts student from 1990-2004. Estimate the percent decrease (to the nearest whole percent) in his 1992 exam score to the exam score in 2000.

According to the graph, his math exam score in 1992 is in between 90 and 100 (around 95) and his math exam score in 2000 is a little more than 70 (it is 72).

percent change

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