1a. The new height of the tomato plant is 23cm.
To find this, we need to find what 15% of 20 is and then add it to the 20. To find 15% of 20, we multiply.
15% * 20 = 3
Now we add that to 20 to get the final answer.
20 + 3 = 23
1b. The new tomato plant grew 30%.
In order to find this, we need to use the percent change formula. The formula is below for you.
(New - Old)/Old * 100 = %Change
(312 - 240)/240 * 100 = %Change
72/240 * 100 = %Change
.3 * 100 = %Change
30% = %Change
