Given that a ratio 2 is equal to B ratio 3 is equal to C ratio 4, find a ratio B to C

Given that a ratio 2 is equal to B ratio 3 is equal to C ratio 4, find a ratio B to C

a：b：c=2:3:4
Because 6A: 12 = 4B: 12 = 3C: 12
So 6A = 4B = 3C, so a: B: C = 2:3:4

-2 / 3 △ (- 7) × (2 and 5 / 4) is equal to

-2 / 3 ÷ (- 7) × (2 and 5 / 4)
You write the denominator backwards
= 3/2 x 1/7 x 14 /5
= 3/2 x 2 /5
=3 / 5
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A. If there are three numbers B and C, 2 / 3 of a equals 4 / 7 of B, 2 / 3 of B equals 4 / 7 of C, and C is 1 / 3 larger than a, then B is

A * 2/3 = B * 4/7
A = B * 6/7
B * 2/3 = C *4/7
C = 7/6 B
C - A = (7/6 - 6/7)B = 1/3
B = 14/13
A =14/13 * 6/7 = 12/13
C = 14/13 * 7/6 =49/39