15 points!! Please help

see below

Step-by-step explanation:

106

The tens place is the 0, so we look at the ones place

Since 6 is 5 or greater we round the tens place up

0 will round to 1, and the ones places  goes to 0

106 rounds to 110

We need a number less than 180 that will round up to 180 from the tens place

We look at the tens place, it has to be less than 8 by 1

17 x

The number must be 5 or greater to round the 7 up to 8

175, 176, 177, 178, 179 will work

We need a number greater than 180 that will round down to 180 from the tens place

We look at the tens place, it has to be equal to 8

18 x

The number must be 4 or less to leave the 8 alone

180, 181, 182, 183, 184

16

step-by-step explanation:

2 x 40 = 80

80/5

= 16

the answer is 15% decrease