Economy rate, bowling average and strike rate.

Runs conceded divided by overs bowled. The catch is the overs: cricket writes them in base six, so 3.4 means three overs and four balls, which is twenty-two balls, not 3.4 overs. Convert to balls, divide by six, then divide the runs by that. Treating 3.4 as a decimal inflates or deflates the answer by several percent and by a different amount every time.

Bowling average is runs per wicket and bowling strike rate is balls per wicket. One measures what a wicket costs, the other how long it takes. A containing bowler can have a good economy and a poor strike rate, and a wicket-taker can have the opposite, which is why a scorecard quotes all three rather than picking one.

It depends entirely on the format, and the figures line is the honest summary: overs, maidens, runs, wickets, written 4-1-32-2. In a twenty-over match an economy under seven is usually respectable and under six is good; in a fifty-over match the bar is lower. We do not grade the numbers here because a village pitch and a Test match are not the same question.