Calculate free throw or field goal shooting percentage, and how many more makes in a row it takes to reach a target percentage.
This tool calculates your current shooting percentage from makes and attempts, and can also tell you how many additional shots in a row (assuming all are made) it would take to reach a target percentage.
Shooting % = (Makes ÷ Attempts) × 100
Makes Needed (x) = (Target% × Attempts - Makes) ÷ (1 - Target%)
68 makes out of 80 attempts is an 85% shooting percentage. To reach 90%, you'd need to make about 17 shots in a row without a miss.
Free throw % = (free throws made ÷ free throws attempted) × 100.
In basketball, 75%+ is generally considered solid at competitive levels, with elite shooters often exceeding 85-90%.
The same made/attempted percentage formula applies to field goal percentage or any other shooting statistic, just using different attempt/make counts.