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B) 2/7 x 630 = 2x90= 180
C) 11/15 x 105 = 11x7= 77
D) 16/14 x 126 = 16 x 9= 144
420 ÷ 6 = 70
70 × 4 = 280
Respuesta = 280
b) 3/7 de 630
630 ÷ 7 = 90
90 × 3 = 270
Respuesta = 270
c) 11/15 de 105
105 ÷ 15 = 7
7 × 11 = 77
Respuesta = 77
d) 16/14 de 126
126 ÷ 14 = 9
9 × 16 = 144
Respuesta = 144