Percentages, SM-Bank 055

Barry weighed 80 kg and started doing triathlons.

He lost 2.8 kg in the 1st month, 3 kg in the 2nd month and 2.2 kg in the 3rd month.

What percentage of his original weight did Barry lose? (2 marks)

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\(10\text{%}\)

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\(\text{Total kilograms lost}\)

\(=2.8+3+2.2=8.0\)

\(\text{Percentage of original weight lost}\)	\(=\dfrac{8}{80}\times 100=0.1\times 100\)
	\(=10\text{%}\)