GRE Quant · Chapter Test
Data Interpretation — 25-Question Test
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Formula Reference Sheet
This chapter
The workhorse relationships
| Percent of a total | (part / total) × 100 % |
|---|---|
| Percent change | (new − old) / old × 100 % |
| Value from a pie slice | (slice percent) × grand total |
| Slice angle ↔ percent | percent = (angle / 360°) × 100 |
Reading & estimating
| Average of several bars | (sum of the bar heights) / (number of bars) |
|---|---|
| Ratio of two categories | value A : value B (same units!) |
| Estimation cue | if the answer choices are far apart, round and skip the calculator |
GRE reference
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