Răspuns :
Răspuns:
90 min______100%
x min________80%
x=(90•80)/100=72 min
=>18 min mai sunt
Calculăm cate minute au trecut:
90 × 80% = 90 × 80/100 = 90× 8/10 = 9 × 8/1 = 72 minute
Minutele rămase = 90 - 72 = 18 minute
Răspuns:
90 min______100%
x min________80%
x=(90•80)/100=72 min
=>18 min mai sunt
Calculăm cate minute au trecut:
90 × 80% = 90 × 80/100 = 90× 8/10 = 9 × 8/1 = 72 minute
Minutele rămase = 90 - 72 = 18 minute