Science lab data?

Question

ok so for science class i made three solar houses that each had a different starting temp.

house 1 started at 25 degrees

house 2 at 23

house 3 30

so i have to have a percent for the temp increse and decrease

house 1 rose to 50 degrees

house 2 to 55

house 3 to 61

later the houses temp decreased when they were taken out of the sun

house 1 went from 50 to 46 (-4 degrees)

house 2 went from 55 to 44 (-11 degrees)

house 3 went from 61 to 53 (- 8 degrees)

so basically because each house had a different starting temp i need to know how to figure out what each houses temp increase % is and what each houses temp decrease % is

im kind of confused on how to do the math so thanks for anyone who can help

Answer 1

percent of increase = (amount of change/original amount) x 100

for house 1:

= [(50 - 25) / 25 ] x 100

= (25/25) x100

= 100% increase

percent of decrease is calculated the same way:

= (amount of change/original amount) x 100

house 1:

= [(50 - 46)/50] x 100

=  (4/50) x 100

= 80% decrease