the price of oil has increased by $0.06 during the period
you would do 3-4=-1 and then -1+7= 6
so you would be left with a gain of $0.06
hope this helps! good luck!
The price of the gallon heating oil changed by 6c
Initial rising of the price of heating oil is 3c and then it falls by 4c
Thus net change in the price is = (3 - 4)c = -1c
The price of the gallon of heating oil was reduced by 1c.
After that it again rose by 7c,
thus net increase in price is
= (-1 + 7)c = 6c
Thus the price again increased by 6c for the final time.
Percentage increase in the good if we assume that the original price of the gallon of heating oil was 100c ,
% increase = (100/100+6) * 100 %
= 94.34 %
Net increase = (100 - 94.34)% = 5.66%
Therefore the price of the gallon heating oil changed by 6c.
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