WORD PROBLEMS 2

1/9 of the lessons is Allocated to mathematics and 1/5 is allocated to civics. What fraction is left for other subjects?

solution

amount of lessons allocated = 1  +  1

                                               9      6

amount of lessons allocated = 6  +  9

                                                  54

amount of lessons allocated = 15

                                               45

Now, the total number of lessons  = 1 = 45

                                                               45

Fraction for other subjects = total number of lessons  -  amount of lessons allocated.

Fraction for other subjects = 45  -  15

                                             45     45

Fraction for other subjects = 30 

                                            45    

Hence fraction for other subjects is 30/45

TRY THIS..................

3/11 of the lessons is Allocated to mathematics and 1/22 is allocated to Geography. What fraction is left for other subjects?