Odpowiedź:
a)
75 = 100%
18 = x
korzystajac z proporcji
x/100% = 18/75
x = 18/75 * 100% = 18/3 * 4% = 6 * 4% = 24%
b)
4 = 100%
4 1/2 = x
x/100 = 4 1/2 : 4 * 100%
x = 9/2 * 1/4 * 100% = 9/2 * 1/4 * 100% = 9/2 * 25% = 18/2% = 9%
c)
25 = 100%
35 = x
x/100% = 35/25
x = 35/25 * 100% = 35 * 4% = 140%
d)
700 = 100%
665 = x
x/100% = 665/700
x = 665/700 * 100% = 665/7% = 95%
e)
1500 = 100%
150 = x
x/100% = 150/1500
x = 150/1500 * 100% = 150/15% = 10%
f)
120 = 100%
380 = x
x/100% = 380/120
x = 380/120 * 100% = 38/12 * 100% = 38/3 * 25% = 950/3% = 316 2/3%
Szczegółowe wyjaśnienie:
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Odpowiedź:
a)
75 = 100%
18 = x
korzystajac z proporcji
x/100% = 18/75
x = 18/75 * 100% = 18/3 * 4% = 6 * 4% = 24%
b)
4 = 100%
4 1/2 = x
x/100 = 4 1/2 : 4 * 100%
x = 9/2 * 1/4 * 100% = 9/2 * 1/4 * 100% = 9/2 * 25% = 18/2% = 9%
c)
25 = 100%
35 = x
x/100% = 35/25
x = 35/25 * 100% = 35 * 4% = 140%
d)
700 = 100%
665 = x
x/100% = 665/700
x = 665/700 * 100% = 665/7% = 95%
e)
1500 = 100%
150 = x
x/100% = 150/1500
x = 150/1500 * 100% = 150/15% = 10%
f)
120 = 100%
380 = x
x/100% = 380/120
x = 380/120 * 100% = 38/12 * 100% = 38/3 * 25% = 950/3% = 316 2/3%
Szczegółowe wyjaśnienie: