2 1/2 - 1 2/7

the last question to finish my one of many tests ive been piling up

21/2 - 12/7

(21*7 - 12*2) /14

(147 - 24) /14

123 / 14

8.786

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies