Tuesday 21 April 2015

WORD PROBLEMS 3


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      5
amount of lessons allocated = 5  +  9
                                                   45
amount of lessons allocated = 14
                                                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  -  14
                                              45     45

Fraction for other subjects = 31 
                                              45     

Hence fraction for other subjects is 31/45

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


3/11 of the lessons is Allocated to mathematics and 5/8 is allocated to Geography. What fraction is left for other subjects?


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