Are you trying to convert the percentages into fractions or??
<h2>Long short story: I tried ;-; </h2>
For this type of question, you just need to multiply the percentage with the number
so, the calculation would be
47.2% x 300
47.2/100 x 300
47.2 x 3
= 141.6
Elevation above sea level = 2x+50
rock climbers minute of climbing = x
2x + x + 50
3x + 50