How to change Bar Chart values to percentages in Matplotlib?

To change bar chart values to percentage in matplotlib, we can take the following steps

Steps

Set the figure size and adjust the padding between and around the subplots.
Make a list of frequencies.
Create a new figure or activate an existing figure.
Make a bar plot using bar() method.
Iterate the bar plot and find the height of each patch and use annotate() method to put values in percentages.
To display the figure, use Show() method.

Example

import numpy as np
from matplotlib import pyplot as plt

plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True

frequencies = [7, 8, 5, 3, 6]

plt.figure()

p1 = plt.bar(np.arange(len(frequencies)), frequencies)

for rect1 in p1:
    height = rect1.get_height()
    plt.annotate( "{}%".format(height),(rect1.get_x() + rect1.get_width()/2, height+.05),ha="center",va="bottom",fontsize=15)

plt.show()