This is percent of change

15 yards to 18 yards

100 acres to 140 acres

$15.60 to 18 yards

125 centimeters to 87.5 centimeters

1.6 hours to 0.95 hour

and

132 days to 125.4 days

I was just wondering because so I could check my answers

15 - - > 18 is a percentage of 18/15*100 which is 120, so it's a 20% increase. Do the same for the rest:

100 to 140 is a 40% increase

" $15.60 to 18 yards" that doesn't make sense

125 to 87.5 is a 30% decrease

1.6 to 0.95 is a 40.625% decrease.

132 to 125.4 is a 5% decrease.

For the working, you do (first number/second number) * 100 and then work out what it's gone up or down by. If it's more than 100, do that number - 100, if it's less than 100 do 100-that number.