What is 1/2 - 3/10 write it in simplist form

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

Can someone me out here number 4 plz

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.