А)                                   10%от 40 = 40% от10
40/100*10                                                                  10/100*40 

40/100=0.4*10=4                                                       10/100=0.1*40=4

Б)            60% = 33                                           100*33/60

               100% = Х                                           100*33=3300/60=55

ОТВЕТ: 100% = 55                                        В ПРОПОРЦИИ МЫ ДЕЛАЕМ НА КРЕСТ