Question

if 4 upon 5 = 12 upon ? then ?=
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Answer 1

Answer:

4/5=12/15

Step-by-step explanation:

4/5=4×3/5×4=12/15

this is the answer

Answer 2

Answer:

$\frac{4}{5} = \frac{12}{?} = 4 {?} = 12 \times 5 = 4 {?} = 60 \\ {?} = \frac{60}{4} = 15$