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b.36(3*1200, todo entre 100)
c.16,8(14*120, todo entre 100)
d.40(4/5*5000, todo entre 100)
x ------------------25% ⇒ 25 x 400 / 100 = 100
b) 1200-----------------100%
x-------------------3% ⇒ 3 x 1200 / 100 = 36
c) 120------------------100%
x--------------------14% ⇒ 14 x 120 / 100 = 16.8
d) 5000------------------5/5%
x---------------------4/5% ⇒ 4/5 x 5000/5/5 = 4000