Jason collected 80 postcards. of these,16 were from foreign countries. what percent were from foreign countries?

20%

to calculate the percentage , make the fraction of foreign cards over total cards and multiply by 100%

= x 100% = = 20%

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.