A student raises her grade average from a 75 to a 90. What was the percent of increase in the students grade average? Round your answer to the nearest tenth of a percent, if necessary!!!!!!!!!!!!!!!

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kling.luz · Accepted Answer

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orval81 · Answer

here are some formulas...percent increase = (new number - original number) / original number...* 100percent decrease = (original number - new number) / original number...* 100============a student raises her grade from a 75 to a 90....since it is going from a smaller number to a larger number, u have an increasepercent increase = (90 - 75) / 70....* 100 = 15/70 * 100 = 0.2142 * 100 = 21.42 rounds to 21.4% increase-------------------------36.50 on sale for 32.12...since it goes from a larger number to a smaller number, u have a decreasepercent decrease = (original number - new number) / original * 100 = (36.50 - 32.12) / 32.12...* 100 = 4.38 / 32.12...* 100 = 0.1363...* 100 = 13.63 rounds to 13.6% decrease------------------------------23.5 to 21.2......this is a decreasepercent decrease = (original number - new number) / original...* 100 = (23.5 - 21.2) / 23.5....* 100 = 2.3 / 23.5....* 100 = 0.0979 * 100 = 9.79 rounds to 9.8% decrease

A student raises her grade average from a 75 to a 90. What was the percent of increase in the student’s grade average? Round your answer to the nearest tenth of a percent, if necessary!!!!!!!!!!!!!!!

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