Last year, Nahla opened an investment account with $5400. At the end of the year, the amount in the account had increased by 7.5%. How much is this increase in dollars? How much money was in her account at the end of last year?

Step-by-step explanation:

7.5% would be 405. Honestly to find it quickly, i took 10% of 5400,which is 540 and divided that by 4 to get 135 and multiply that by 3 to get 7.5%, which is 405 increase. to get the money total add 405 to 5400 to get 5805

chicken chicken chicken

step-by-step explanation:

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x