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ONLINE LESSON -1-2
PERCENTAGE AND RATIO
Ratio, Proportion, Units, and Percentage
DIAGRAMS AND GRAPHS
Ratio and proportion is one of the major ideas in mathematics. Introduced well before high school, ratio and proportion is a theme throughout mathematics, in applications, in careers, in college mathematics courses, and beyond.
Percent is a type of proportion that means “per 100”; 20%, for instance, means 20 out of (or per) 100. Percent increase or decrease is calculated by finding the difference between two quantities, then dividing the difference by the original quantity and multiplying the result by 100.
FORMULA OF PERCENTAGE a% of y , it means (a% * y ) : 100% for example, Find 20% of 50 (20%*50): 100 % = 10
The price of table – 250 $ , on Sunday was sale till 30%. If Salohiddin bought the table on Sunday, how much it paid? Solution: if original price of table was 250 $, but sale ( скидка) -30 %. Lets , find 30 % of 250 (30*250):100= 75 $ So that, we subtracted , 250$-75$ = 175 $
Salohiddin’s salary 2 500 000 soum. He spent his money for book, for home tax, for clothes to ratio of 2:3:5. How much did spent for each one.
Solution: Each term of ratio multiple by x unknown ( x , неизвестно число) 2x , 3x , 5x , if we added all terms, we’l take whole value. So that, 2x+3x+5x = 2500000 ( equation) 10x=2 500 000 X= 250 000, 2x= 2*250000=500 000, 3x=3*250000= 750000, 5x=5*250000= 1 250 000 Solved!
Baliqni 2:5:6 nisbatda 3 qismga ajratishdi. Dum, qorin, bosh. Dum 900 gramm bo’lsa, baliqni butun og’irligi qancha?
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FIND THE ALL POINTS
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