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The **absolute growth rate** is the **measurement** and the **comparison** of **total growth** per unit time, while the **relative growth rate** is the** growth **of the given system **per unit time** which is expressed on a common basis (per unit initial parameter).

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The measurement and comparison of total growth per unit time is called as Absolute growth rate.

The growth of the given system per unit time expressed on a common basis is called as Relative growth rate.

**For example:**

Two leaves X and Y having different sizes show exact absolute increase in the area in the given time.

But, one of them has a much higher relative growth rate.

Consider, both the leaves have grown by 5 cm^{2 }in a single day

The initial size of leaf X was 5 cm^{2}, while that of leaf Y was 40 cm^{2.}

Though the absolute growth rates both the leaves is the same, the relative growth rate in leaf X is faster.