Question

In January 2013 I weighed 72kg .Then I gained a lot of weight and by January 2014 I weighed 81 kg .Then I went on a diet and regularly went to the gym.By January 2015 my weight was 76.5kg .By how much percentage did my weight increase during the first year and then decrease during the next year? What was the overall percentage change in weight over the two years?​

Answer 1

Step by step explaination with answer:

First part-(weight increased during first year)

In 2013 January your weight was 72kg and in 2014 your weight was 81 kg . So it means you gained weight..

So,

gained weight=(81 -72) kg=9kg

percentage increase in weight = Gained weight*100 /last year weight

%increase=9*100/72

By solving we get 12.5%

Second part-(weight decreased during second year)

In Jan 2014 your weight was 81 kg and in Jan 2015 your weight was 76.5 kg. So you lose your weight.

So, lost weight =( 81-76.5 )kg =4.5 kg

percentage lost in weight = Lost weight *100/last year's weight

%weight lost =4.5*100/81

By solving we get 5.56 %.