Answer:
137.5%
Explanation:
V1 = speed of typing before joining the course = 16 words per minute.
V2 = speed of typing after end of the course = 38 words per minute.
The percentage increase in the typing speed is:
= ( V2 - V1 )/ V1 multiple by 100
= ( 38 - 16 )/ 16 multiple by 100
= 11/8 * 100
= 275/2
= 137.5%