Question

How things will change if we changed gravity?? If it became some percent stronger or weaker? How destructive it can be ??

Answer 1

If We Change Its Gravity! As Gravity A Force of Attraction So, We We Change Gravitational force We Will Change Its Force Of Attraction So it will Become more Or Less Attractive To towards Another Thing!

g=Gm1*m2/r²

So change Will depended On this Formula

Answer 2

if we change the gravity then the force that binds us to the earth will change, the motion of the Moon around the earth will also affect ,the motion of planets around the sun and the Tides due to the moon and the sun will also a affect there will be changes in all these things.
if it will be some percent stronger than the moon will fall on earth,
all the gases in atmosphere will come closer to the earth surface,
and earth will attract all the things in the space,etc
if it will become % weaker than the moon will go far from Earth, some heavy things will flow ,etc .
it can be very destructive for the existence of life
even we can not think of it .
hope this will help