Question

a boy get 450 rupees per months and spend 40 percent of it how much money he had now

Answer 1

270 is the amount of money he is left with

Answer 2

BOY SPENDS 40% OF HIS MONEY FROM 450 RUPEES
SO, 450/100*40
YOU WILL GET 180 AFTER SOLVING IT.

SO, AMOUNT LEFT = 450-180
                             ANSWER= RUPEES 270