<span>If 10% of x is 20,
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</span><span>then x = 200.</span><span>what is 23% of x?
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23% = (23/100)*200 = 46</span>
He starts out with the weight of 160, at the end of those 12 months he weighs 232. if you subtract 160 and 232 the approximate rate of change should be 72