WORD PROBLEMS-1

1/9 of the lessons is Allocated to mathematics and 2/5 is allocated to civics. What fraction is left for other subjects?

solution

Amount of lessons allocated = 1  +  2

                                                9      5

Amount of lessons allocated = 5  +  18

                                                     45

Amount of lessons allocated = 23

                                                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  -  23

                                             45     45

Fraction for other subjects = 22 

                                            45    

Hence fraction for other subjects is 31/45

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

⁷/10 of the lessons is Allocated to mathematics and ⁵/8 is allocated to Geography. What fraction is left for other subjects?