Answer:
...1969, the price of 5 kilograms of flour was SO.75. In 1970 the price was increased by 15 cents.
, it costs 0.75+0.15=0.90
--->new price in 1970 = $0.75 + $0.15 = $0.90 for 5 kilograms of flour
in 1971 it fell by 5%
5% decrease= 1-(5/100)=0.95
0.9*0.95=$0.855
new price: $0.855
What was the price of 5 grams of flour in 1971?
5grams? or 5 kg? I think you wanted to write 5kg
new price 5kg: $0.855