[ ( 27 / 18 - 7 / 24 - 5 / 36 ) : ( - 17 / 24 ) - ( 83 - 8 ) / 90 } : 25 / 100 =
→ c.m.m.m.c al numitorilor ( 18, 24 si 36 ) = 2³ x 3² = 72
→ amplific fractiile cu 4; 3, respectiv cu 2
= [ ( 108 / 72 - 21 / 72 - 10 / 72 ) : ( - 17 / 24 ) : 75 / 90 ] : 1 / 4 =
= [ 77 / 72 x ( - 24 / 17) : 5 / 6 ] : 1 / 4 =
= ( - 77 / 51 x 6 / 5 ) x 4 =
= - 154 / 85 x 4 =
= - 616 / 85 =
= 7,247
