83.3%
Step-by-step explanation:Total serve = 6
Number of serves Jessica made = 5
The percent of her serves = Number of serves Jessica made/Total serve × 100
The percent of her serves = 5/6 × 100
= 0.8333 × 100
= 83.33%
To the nearest tenth of a percent = 83.3%
Hence, the percent of serves Jessica makes before the game is 83.3%