(N/A) Growth can be expressed in two ways:
$1$. Absolute Growth Rate: It is the measurement and comparison of total growth per unit time. It represents the actual increase in size or area.
For leaf $A$: Absolute growth = $10 \ cm^2 - 5 \ cm^2 = 5 \ cm^2$.
For leaf $B$: Absolute growth = $55 \ cm^2 - 50 \ cm^2 = 5 \ cm^2$.
Both leaves show the same absolute growth of $5 \ cm^2$.
$2$. Relative Growth Rate: It is the growth of a given system per unit time expressed on a common basis (e.g.,per unit initial parameter).
Formula: $\text{Relative Growth Rate} = \frac{\text{Absolute Growth}}{\text{Initial Size}} \times 100$.
For leaf $A$: Relative growth rate = $(5 / 5) \times 100 = 100\%$.
For leaf $B$: Relative growth rate = $(5 / 50) \times 100 = 10\%$.
Thus,leaf $A$ shows a higher relative growth rate compared to leaf $B$.