Question

1000workers were employed to construct a river bridge in 4 years .At the end of the first year 10 % workers were retrenched .At the end of the second year 5 % of the workers at that time were retrenched. However to complete the project in time the number of workers was increased by 10% at the end of the third year.How many workers were working during the end of the fourth year??
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Answer 1

first u have to calculate the percentage

- total members percentage is 100% for first year and second year decreased is 15% and now 85% third year increased to 10% then 95%

95/100 × 1000= 95

1000- 95 = 905 members are working in the 4th year

hope it's useful