22,50zł ---- 100%
19,80zł ---- x%
x = (19,80 * 100) / 22,5 = 1980 / 22,5 = 88%
100% - 88% = 12% ----- odpowiedź
22,5-19,8=2,7
22,5-100%
2,7-x
22,5x=270
x=12%
Obniżka wynosiła 12%.
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22,50zł ---- 100%
19,80zł ---- x%
x = (19,80 * 100) / 22,5 = 1980 / 22,5 = 88%
100% - 88% = 12% ----- odpowiedź
22,5-19,8=2,7
22,5-100%
2,7-x
22,5x=270
x=12%
Obniżka wynosiła 12%.