There is 150% increase in the number of volunteers.
Step-by-step explanation:
Given,
Old number of volunteers = 20
New number of volunteers = 50
Change = New value - Old value
Change = 50 - 20 = +30
The positive sign indicates the increase.
Percent increase = [tex]\frac{Change}{Old\ value}*100\\[/tex]
[tex]Percent\ increase=\frac{30}{20}*100\\\\Percent\ increase=\frac{3000}{20}\\\\Percent\ increase=150\%[/tex]
There is 150% increase in the number of volunteers.
Keywords: percentage, subtraction
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