Question

a)Cat la suta din distanta 400 km reprezinta distanta 320 km ?
b)Cat la suta din distanta 20 km reprezinta distanta 300 km ?

Answer 1

a) p% din 400=320

p/100 * 400=320

p/100= 320/400

p/100= 8/10

p=100*8/10

p=80%

b)p% din 20= 300

p/100 * 20=300

p/100= 300/20

p/100= 15

p=1500%

Answer 2

400..................100%
320................... x %
____________________
x=320x100/400
x=80 %


20.......................100%
300.................... x %
_______________________
x=300x100/20
x=1500%