python convert percentage value into decimal number

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def percent_to_decimal(percent):
    return float(percent[:-1]) / 100.0


# Usage example:

print(percent_to_decimal('10%'))  # 0.1
print(percent_to_decimal('20%'))  # 0.2
print(percent_to_decimal('50%'))  # 0.5
print(percent_to_decimal('100%')) # 1.0