Question

Oblicz: 15% ze 100 kg 15% z liczby 500 15% z 20 km 15% ze 150 m 20% liczy 200

Answer 1

15%*100kg =15*100/100 kg =15kg
15%*500 =15*500/100 =15*5 =75
15%*20km =15*20/100 km =300/100km =3km
15%*150m =15*150/100 =225/10 =22,5 m
20%*200 =20*200/100 =20*2 =40

Answer 2

15 % z 100 kg

100 % - 100 kg
  15 % -  x

x = (15 x 100) : 100
x = 1500 : 100
x =15 kg

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15 % z 500

100 % - 500
  15 % -  x

x = (15 x 500) : 100
x = 7500 : 100
x =75

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15% z 20 km

100 % - 20 km
  15 % -  x

x = (15 x 20) : 100
x = 300 : 100
x = 3 km

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15% z 150 m

100 % - 150 m
  15 % -  x

x = (15 x 150) : 100
x = 2250 : 100
x = 22,5 m

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20% z 200

100 % - 200
  20 % -  x

x = (20 x 200) : 100
x = 4000 : 100
x = 40