Hey there.
Considering our ratio from fruit to sugar is 2:3, this means we need to make a proportion. I will set this up below;
2:3 = 8:x; x is a variable substitute for our missing sugar value. Let's try to see if 2 divides into 8.
8 / 2 = 4; this means our scale factor of our ratio is 4x larger than the current value, so multiply 2 and 3 by 4 to solve for sugar.
2:3;
2 x 4 = 8; 8:x
3 x 4 = 12; 8:12.
12kg is the missing sugar value in our proportion; therefore, 12kg of sugar is used when 8kg of fruit is used.
I hope this helps!