Let original length = x metres and original breadth = y metres
Original Area=xy m2
New Length =120100x=65x
New Breadth=120100y=65y
⇒New Area=65x * 65y
⇒New Area=3625xy
Area Difference=3625xy−xy
=1125xy
Increase%=DifferenceActual * 100
=11xy25 * 1xy * 100
=44%