Type the correct answer in the box. Use numerals Instead of words. If necessary, use / for the fraction bar. Find the missing number in this proportion. (10)/(15) = (?)/(21) ​

Question

Type the correct answer in the box. Use numerals Instead of words. If necessary, use / for the fraction bar. Find the missing number in this proportion.


`(10)/(15) = (?)/(21)`
​

Answer 1

for what?

Explanation: