Solution: According to the formula, the hit rate is 8÷20× 100%=40%.
2. Wang Bing missed four shots, but he made six. What percentage did he hit?
Solution: There are 6-4=2 rounds. According to the formula, the hit rate is about 2÷6≈0.333=33.3%.
3. How many balls were thrown, and the hit rate was 52%. If you hit 13 balls, how many balls did you miss?
Solution: Suppose you miss X shots.
13÷52%-x= 13
25-x= 13
x= 12
It can also be solved by arithmetic. If * * * throws 13÷52%=25 (pieces), then you miss 25- 13= 12 (pieces).