Question

a pair of designer sneakers was purchased for $120 since they were purchased their price has increased by 15% what is the new priceHow to do the multiplication 1.15 x 120

Answer 1

Original cost price = $ 120

Percentage increase = 15%

New Price calculation ; Method 1

Find 15% of $120 and add the result to $120

`\begin{gathered} (15)/(100)*120=18 \\ \\ \Rightarrow18+120 \\ \Rightarrow138 \end{gathered}`

New Price = $138

New Price calculation ; Method 2

Add 15% to the standard percentage ( 100 % ) .

This will give 115%

Find 115% of $120

This will give direct answer.

`(115)/(100)*120=1.15*120=138`

New Price = $138

NOTE : If price decrease , you will carry out a subtraction process.

It means , in method 1 , you will find 15% of $120 and subtract the result from $120 to get new price.

It also means that , in method 2, you will find 85% of $120 and get the direct answer.