Question

After 4 weeks, the height of the plants had grown from 6 inch to 12 inches. Write and solve a proportion to find the percent increase in the height of the plants

Answer 1

For this case, the first thing we should do is define a variable.

• x: percentage of plant growth

The formula that models this problem is given by:

$x = \frac {| initial\ height-final\ height |} {initial\ height} * 100$

Substituting values we have:

$x = \frac {| 6-12 |} {6} * 100$

Rewriting:

$x = \frac {| -6 |} {6} * 100\\x = \frac {6} {6} * 100\\x = 100\%$

Answer:

The percent increase in the height of the plants is 100%