Learn exactly how to calculate percentages in this simple lesson! once you"re inquiry to calculation an (unknown) percentage ("What percentage...?"), you need to very first write the portion PART/TOTAL, and then merely write that portion as a decimal and also as a percentage. See countless examples below.

You are watching: 9/20 as a percent

The concepts and ideas of this lesson are additionally explained in this video:

What percentageof the height of a 15-ft tree isa 3-ft sapling?A choir has 22 women and 18 men. Discover what percentageof the choir’s members aremen.One pair the jeans prices $25 and another expenses $28. How many percent is the price that cheaper jeans of the price the the much more expensive jeans?

Look carefully at the inquiries above. Notice that the troubles don’t tell girlfriend the percentage; in other words,there is no number in the difficulty written together x%. Instead, lock ask friend to uncover it!

Questions through “What portion ... ?” or "How countless percent ... ?"

Asking “What percentage?” or "How many percent?" is the exact same as asking “How numerous hundredth parts?”

We can solve these concerns in a two-part process:

First discover out the component that is gift asked for together a fraction.The denominator probably won’t it is in 100.Convert that portion to a decimal. Climate you have the right to easily convert the decimal to a percentage!

Example 1. A choir has actually 22 women and 18 men. Find what percentage of the choir’s members space men.

Find out what component (fraction) that the choir’s members space men. That is 18/40, or 9/20.Write 9/20 as a percent. Use equivalent fractions: 9/20 = 45/100 = 45%.

Example 2. One pair of jeans expenses $25 and the other expenses $28.How many percent is the price that cheaper jeans of the price that the an ext expensive jeans?

Write what component the cheaper price is that the an ext expensive price. The answer is 25/28.Write 25/28 together a percentage. A calculator provides 25/28 = 0.8928... Rounded to the nearest whole percent, that’s 89%.

1. a. What portion of a 15-ft tree is a tiny 3-ft sapling?

b. How plenty of percent is $12 the $16?

2. Discover how plenty of percent the smaller sized object’s elevation is that the higher object’s height.


6 m

8 m
300 cm
120 cm
b.3. A 2-year old child steps 32 customs tall and also weighs 24 pounds. A 10-year old child steps 52 inches tall and weighs 96 pounds.

a. How many percent is the smaller sized child’s age of the larger child’s age?


See more: Solved:Seawater Is Sea Water Homogeneous Or Heterogeneous, Attention Required!

How many percent is the smaller sized child’s elevation of the larger child’s height?

4. Write the percentages into the sectors in the circle graphs Think that fractions!


5. The circle graph at the right gives the angle measure up of each sector the the circle. Uncover what percentage each ar is that the totality circle, and write the portion in the sector. Remember, the totality circle is 360°.

See also

Percent – cost-free lesson

Percentage of a number using psychological math – complimentary lesson

How to calculate percentages of numbers – cost-free lesson

Basics of percent of change – complimentary lesson

Interactive fraction, decimal and percentage toolThis tool mirrors you a fraction visually (bar or pie) and also converts the portion into a percentage and also decimal. You can present or hide the equivalent percentage and also decimal./interactives/fraction_decimal_percentage.php

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