2 apples for 0.15

x apples for 0.70

2 : 0.15 = x : 0.70

by solving we find

x = 28/3

x = 9 1/3 apples

click here to see the step by step solution of the equation

you can buy 9 1/3 apples or if the number of apples that can be bought is integer, 9 apples for 0.70.