To solve this problem you can either convert from kg to g, or you can do the opposite action. Since 1kg equals 1000g, converting from kg to gram is much easier.
A- 1kg=1000g so 25kg is 1000g 25 times, therefore it is 25x1000 which is 25,000g.
B- We now need to find what percentage of 25,000g is represented by 750g. We know that 25,000g is 100%, which is 25,000/25,000. So 750g is 750/25,000=0.03.
So, 750g is 3% of 25kg.
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