O1=69,08m, o1=2πr1, 2πr1=69,08m, r1=34,54/π m
S1=π(r1)²=34,54²/π m²
o2=75,36m, o2=2πr2, 2πr2=75,36m,r2=37,68/π m
S2=π(r2)²=37,68²/π m²
34,54²/π.........100%
37,68²/π..........x %
-----------------------------
x/100=37,68²/34,54²=(37,68/34,54)²≈1,09²
x≈100.1,09²=100.1,1881=118,81≈118,8
118,8%-100%=18,8%
=====