0
Anonymous
First set up a proprotion 21 over 8 = x over 100.
then cross multiply to get ... 2100 = 8x , then divide both sides by 8 to get 262.5 = x
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8/21 = 0.381
821/40 = 8.525
2.625
The answer is 0.4
It is: 8.525
21/8 = 2.625