The percent of change rounded to the nearest tenth is 10.5 %
Solution:
Given that Mack shot an 86 on the golf course on Monday
Then, on Friday he shot a 95
To find: percent of change
Percent increase and percent decrease are measures of percent change, which is the extent to which a variable gains or loses value.
Percentage change equals the change in value divided by the original value, multiplied by 100.
![\text {percentage change }=\frac{\text { final value - original value }}{\text { original value }} * 100](https://img.qammunity.org/2020/formulas/mathematics/middle-school/xxab6bpzb5kukqkipkfh0o1qp7ve3ew4oy.png)
Here original value = 86 and final value = 95
![\begin{array}{l}{\text { percentage change }=(95-86)/(86) * 100=(9)/(86) * 100} \\\\ {\text { percentage change }=10.465}\end{array}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yrbykrphr6vrewefvfyaac4fel859mmaqd.png)
A positive result indicates increase in percentage
On rounding to nearest tenth we get, percent of change = 10.5 %
Thus the percent increase is 10.5 %