Respuesta :
Answer:
29 percent
Step-by-step explanation:
you do 15/21 times 100 then minus that number from 100 so
15/21 times 100= 71------>100-71=29%
Answer: 40% increase
The team won 6 more games than the previous year since 21-15 = 6
Divide this change over the original number to get 6/15 = 0.40 = 40%
if we were took 40% of 15, we would get 0.40*15 = 6
So "an increase of 40%" means we add on 6 to 15 to get 15+6 = 21 which is the proper updated win total. A shortcut is to multiply by the value 1.40 since 100% + 40% = 1+0.40 = 1.40; therefore 1.40*15 = 21
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A formula you can use is
P = 100*(x-y)/y
P = percent change
x = new amount (21 in this case)
y = old amount (15 in this case)
