Two thirds of a (not 0) is equal to four seventh of B. what is the simplest integer ratio of a to B?

Two thirds of a (not 0) is equal to four seventh of B. what is the simplest integer ratio of a to B?

1124038761:
A:B=(1÷2/3):(1÷4/7)
A:B=3/2:7/4
A:B=6/4:7/4
A:B=6:7
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