You're thinking of FDR: False discovery rate. It equals Σ False positive/Σ Predicted condition positive. See https://en.m.wikipedia.org/wiki/Precision_and_rec

You're thinking of FDR: False discovery rate. It equals Σ False positive/Σ Predicted condition positive. See https://en.m.wikipedia.org/wiki/Precision_and_recall https://en.m.wikipedia.org/wiki/Precision_and_recall for a table of different terms.