PLEASE HELP ME PLEASE

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?