Pomocyyyy :( Oblicz 4 % liczby 25 , 0,5 % liczby 140, 85% liczby 70,2 , 135% liczby 15, 1010% liczby 12.    

100% - 140 0,5% - X        x=2,8   100% - 70,2 85% -  X        x=59,67   15 - 100% x  - 135 %     x=20,25   1010% - x 100% - 12     x=151,5

4%liczby 25 =1 bo 4*25/100 i wszedzie jest taka sama zasada czyli 0,5 % liczby 140 = 0,7 85% liczby 70,2 =59,67 135% liczby 15 = 20,25 1010% liczby 12 =  121,2 ;D  

4 % liczby 25 -------------------- 25 - 100% x - 4% x = 25 * 4%/100% x = 100/100 x = 1 ================================= 0,5 % liczby 140 --------------------- 140 - 100% x - 0,5% x = 140  * 0,5/100% x = 70/100 x = 0,7 ============================== 85% liczby 70,2 ------------------------ 70,2 - 100% x - 85% x = 70,2 * 85%/100% x = 5967/100 x = 59,67 ================================ 135% liczby 15 ------------------- 15 - 100% x - 135% x = 15 * 135%/100% x = 2025/100 x = 20,25 ================================ 1010% liczby 12 --------------------- 12 - 100% x - 1010% x = 12 * 1010%/100% x = 12120/100 x = 121,2 ==================================