Oblicz. 1. 30% liczby 50 2. 50% liczby 96 3. 75%liczby404 4. 20%liczby 80 5. 5% liczby 400

1. 50 * 0,30 = 15 2. 96 * 0,50 = 45 3. 404 * 0,75 = 303 4. 80 * 0,20 = 16 5. 400 * 0,05 = 20

1. 30% - x 100% - 50 100x= 30*50 100x=1500 | :100 x=15 2. 96 -100 % x - 50 % 96*50 = 100x 4800 = 100x | :100 48 =x 3. 100% - 404 75% - x 100x= 404 *75 100x= 30300 | :100 x= 303 4. 80 - 100% x - 20% 100x= 80*20 100x= 1600| :100 x=16 5. 400 - 100% x - 5% 100x = 400*5 100x =2000 | :100 x= 20

1.15 2. 48 3. 303 4.16 5. 20