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L.P = phi × 3/5 r × 3/5 r
= phi × 9/25 r^2
L.Q = phi × r^2
perbandingan
phi × 9/25 r^2 = phi × r^2
9/25 = 1
maka dibuat menjadi persenan
9/25 = 36/100 = 36%
jadi luas P terhadap luas Q = 36%