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x% = 29
mnożymy na krzyż:
100 x 29 25 x 29 725
------------ = ------------ = ----------- = 80 ,(5) w zaokrągleniu 81%
36 9 9
100% = 96
23% = x
mnożymy na krzyż:
23 x 96 23 x 24 552 2
---------- = ------------- = ------- = 22i ----- =22,08(ponieważ 2 : 25)w zaokrągleniu 21
100 25 25 25
2900:36=80,56%
96 to 100%
96*0,23=22,08