The petrol prices were hiked by 3% and then they were rolled back by 2%.Find the net increase or decrease percent in the prices.
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Solution:-
Let the original price of petrol be Rs. 100
Then after the 3 % increase, the prices will be = 100 + 3 % of 100
= 100 + 3
= Rs. 103
Now, after the decrease in prices of petrol by 2 %, the new prices will be
= 103 - 2 % of 103
= 103 - 2.06
= Rs. 100.94
now, net increase in the prices of petrol = 100.94 - 100
= Rs. 0.94
Percentage of increase = (0.94*100)/100
= 0.94 %
So, the net increase percentage is 0.94 % in petrol prices.
Answer
Let the original price of petrol be Rs. 100
Then after the 3 % increase, the prices will be = 100 + 3 % of 100
= 100 + 3
= Rs. 103
Now, after the decrease in prices of petrol by 2 %, the new prices will be
= 103 - 2 % of 103
= 103 - 2.06
= Rs. 100.94
now, net increase in the prices of petrol = 100.94 - 100
= Rs. 0.94
Percentage of increase = (0.94*100)/100
= 0.94 %
So, the net increase percentage is 0.94 % in petrol prices.
Answer
Agrima2901:
thanku for your effort but the answer section says it is 1%increase. I want the method..
It cannot be exactly 1 % increase. Net increase is 0.94 %. It can be rounded off to 1 %, otherwise the answer is 0.94 % increase.
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