8:32 add the pie chart % up 37+27+15=79% meaning the R&D = 21% 20% are 800.000 divided by 5 = 160.000 1% is 8.000 The exact answer is 168k but approximately 170k is fine.
For the question at minute 7.40 I calculated the percentage of each orange segment ( 20% of total for each pie chart) and then I calculated 80% of the last one to reach the Total and find the last 20%. But it a more long process.
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TDY + TMR + DA TMR + DA DA TMR + 1day + 1day + 1day + Monday = 8 days. so, TDY=Monday. M + T + W + Th + F + Sa + S + M = 8days. the day will repeat, as 7 days a week!!!😇
