Is the percent increase from 50 to 70 equal to the percent decrease from 70 to 50? Explain.

No. The amounts of change are the same, but the original amounts are different.

Step-by-stepNo. The amounts of change are the same, but the original amounts are different. explanation:

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.