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a) a=86,b=21
b) a=25,b=12,3
Najłatwiej to z proporcji:
a - 100
b - x
86 - 100
21 -x
x = (100*21) / 86 = 24,41%
b)
25 - 100
12,3 - x
x = (100*12,3) / 25 = 49,2%
86 to 100%
21 to x%
21*100% 2100
-------- = -------= 24.4%
86 86
b) a=25,b=12,3
25 to 100%
12.3to x%
(12.3 * 100): 25= 1230:25= 49.2%
b)12,3/25*100%=1230/25=49,2%