Round to the underlined place

123

Step-by-step explanation:

I don't know what place you want it rounded to, but if you are rounding to the nearest whole number, it'd be 123 because the 8 after the .9 is greater than 5 which makes the 9 go up.  Since 9 is the last greatest single digit number the 2 before the (.) is rounded up as well to a 3.

a - base

b - exponent

so,

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%