7-5 Fractions, Decimals, and Percents (pgs 312-315)
7-6 Percents Greater than 100 and Less than 1% (pgs 316-318)
Indicator N7 – Solve Problems using percents
Changing percents to decimals• Divide by 100
(Move the decimal 2 spaces to the left)
1) 245% = 2.45
2) 0.075% = 0.00075
You Try
1) 256.5%
2.565
2) 0.06%
0.0006
Changing Percents to FractionsEasy one (review) 14 % is 14 = 7 100 50 (reduce by the GCF 2)Harder6.5% is 6.5 x10 = 65 = 13 100x10 1000 200
Hardest10 ¾% is 10 ¾ = 43 x 1 = 43 100 4 100 400
• You Try
Change the percents to fractions
1) 0.06% 2) 250% 3) 30 1/3 %
3 2 ½ 91
5000 300
Write a decimal as a percent
• You multiply by 100
(moves decimal 2 spaces to the right)
1) 0.0085 = 0. 85%
2) 1 = 100%
3) 42 = 4200%
Changing fractions to percents• Change to fraction to a decimal first
then multiply by 100
1) 3 ¾ = 3.75 = 375%
2) 1 = 0.002 = 0.2%
500
Review of solving percent equationsOf (x) Is (=) What (n)
1) What percent of 45 = 2
n × 45 = 2
45 45
n = 0.04 or 4.4%