the length of a rectangle is increased by 40 % while its width is halved . what is the % change in area ?
n0 = 40.0
t0 = n0 / 100.0
t1 = 1.0 / 2.0
t2 = t0 + 1.0
t3 = t2 * t1
t4 = 1.0 - t3
answer = t4 * 100.0
print(answer)