Question

calcule quanto é a) 10% de 300 10% 1000 b) 15% de 200 7% de 400​

Answer 1

Resposta:

300___100%

x___10%

100X= 300x10

100X= 3000

X=3000÷100

X=30

1000____100%

X____10%

100X=1000x10

100X=10.000

X=10.000÷100

X= 100

200___100%

X____15%

100X=200×15

100X=3000

X=3000÷100

X= 30

400___100%

X___7%

100X=400×7

100X=2.800

X=2800÷100

X= 28