WORD PROBLEMS 7

1/9 of the lessons is Allocated to mathematics and 1/4 is allocated to civics. What fraction is left for other subjects?

solution

amount of lessons allocated = 1  +  1

                                                9      4

amount of lessons allocated = 4  +  9

                                                   36

amount of lessons allocated = 13

                                                36

Now, the total number of lessons  = 1 = 36

                                                                36

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

Fraction for other subjects = 36  -  13

                                              36     36

Fraction for other subjects = 23 

                                              36    

Hence fraction for other subjects is 23/36

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

4/11 of the lessons is Allocated to mathematics and 5/8 is allocated to Geography. What fraction is left for other subjects?