For question #17 in the GRE Official Guide, under the Data Analysis exercises: For 2001, private school expenditures were approximately what percent of total expenditures? A chart is given that displays $30 billion was private expenditures and $160 billion was total expenditures. So I took $30 is x% of $160 or 30/160 = 18.75%.
The answer should be 19%. There's no instructions to round up so I can't figure out what I'm doing wrong?