Cheese sticks that were previously priced at "10 for $1" are now "2 for $1". Find each percent change. Part 1
Find the percent decrease in the number of cheese sticks you can buy for $1.

The percent decrease is
80
%.

Part 2 out of 2
Find the percent increase in price per cheese stick.

The percent increase is
%.

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.