A number patter is a list of numbers that follow a certain pattern like 2,4,6,8,10 is a pattern of 2's
30 is the old value and 55 is the new value. In this case we have a positive change (increase) of 83.33333333 percent because the new value is greater than the old value. Using this tool you can find the percent increase for any value.
$10 multiply by .80 is $8
$10-$8 is $2 is sale price do this for all items.
$1 is .20 cents
$4 is .80 cents
$55 is $11
$120 is $24