Question

Mixing 4 ml of red paint and 15 ml yellow paint makes orange paint. How much red would be needed if you use 100 ml of yellow paint? Please show work

Answer 1

`(4ml)/(15ml)=(xml)/(100ml)\\\\cross\ multiply\\\\15x=4*100\\\\15x=400\ \ \ \ |divide\ both\ sides\ by\ 15\\\\x=(400)/(15)\ \ \ \ \ |divide\ a\ numerator\ and\ a\ denominator\ by\ 5\\\\x=(80)/(3)\\\\x=26(2)/(3)\ (ml)\\\\Answer:26(2)/(3)\ ml\ of\ red\ paint.`