Question

the price of petrol per litre increasing by 5 percent has become 84 what is the original price of petrol​

Answer 1

increased %= 5%

final amount = rs84

original amount ;

step 1 : 5+100/100

= 105 /100

= 1.05

now, step 2: 84/1.05

= 80

therefore, original amount = rs80