Mixture trick - Prep Swift (stuck at one question)

[cringes_squeak.0q]

Hi everyone, regarding the question and steps taken by Greg, I managed to arrive at 3/2 but couldn’t quite figure out why Greg multiples both numerator and denominator by 5 in relation to identifying the ratio of bag A and B to the overall bag weight of 25kg?

Thank you in advance

[thapliyalantara31]

[cringes_squeak.0q]

Thanks! This is helpful. I also re-watched the video and finally understood why Greg multiples it by 5. 3/2 is only a ratio and it doesn’t represent the actual amount.