Generally if you have two numbers a and b the percentage change from a to b is given by the formula. Calculate the percentage increase of the rent If the monthly cost of renting an apartment is 789 in June and the landlord has decided to charge a new price of 80746 in the month of July. Percentage change b - a a.
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Calculate the percentage increase of the rent If the monthly cost of renting an apartment is 789 in June and the landlord has decided to charge a new price of 80746 in the month of July. Subtract 100 from that. Convert that to a percentage by multiplying by 100 and adding a sign Step 3. To calculate the percentage increase.