What's the percentage of 5 / 6 of 18 kg? What's the percentage of 4 / 5 of 2 / 3 kg

What's the percentage of 5 / 6 of 18 kg? What's the percentage of 4 / 5 of 2 / 3 kg

5/6*18=15,2/3kg*(4/5)=8/15kg