To solve, turn each percent into a decimal:
(Divide each percent by 100)
28 -----> .28
25.9 -----> .259
25.4 ------> .254
16.8 -------> .168
5.6 -------> .056
Then multiply the new decimals by the total, 400000, and then add them all up.
.28 x 400000 = 112000
.259 x 400000 = 103600
.254 x 400000 = 101600
.168 x 400000 = 67200
.056 x 400000 = 22400
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Add them all together and you get 406800
Hope this helps!