125 Decreased By A Number

Selina Solutions Class 6 Mathematics Solutions for Practise sixteen(A) in Chapter xvi - Per centum (Pct)

Question 2 Exercise 16(A)

Q2) (i) A number is increased from 125 to 150; find the per centum increase.

(two) A number is decreased from 125 to 100; find the per centum subtract.

Reply:

Solution:

(i) Original number = 125, New value = 150

Increase = (150 - 125) = 25

Increase% = $\frac{25}{125}\times100=xx\%$

(ii) Original number = 125, New value = 100,

Subtract = ( 125 - 100) = 25

Decrease % = $\frac{25}{125}\times100=20\%$

Video transcript

hi everyone my name is nitu jacob i am a tutor at lido and welcome you lot all to lido learning the question that nosotros have hither is a number is increased from 125 to 150 find the percent increment that is the starting time office and what about the 2d part number is decreased from 125 to 100 discover the percent decrease okay and then nosotros need to find the percentage increment in the kickoff instance and the percent subtract in the 2d case yes so what is percentage increase there is a formula for that percent increase is equal to the increment by the original value multiplied past 100 and so here what is the increase increase is nothing but the new value minus the original value by ordinal value into 100 that is for percentage increment now what i want for percentage subtract once more the same formula instead of increase it is decrease and so here decrease ways the new value will be less than the original value then we tin can write the formula equally original value minus the new value past original value into hunt okay so we'll do the question moving on to the first question here the new value is what 150 right and the original value was 125 therefore the percentage increase is equal to 150 minus 125 by the original value was 125 multiplied by 100 okay so 150 minus 125 is 25 by 125 into 100 all right yes so 25 times 5 is 125 and 100 by 5 volition become twenty so the answer is what answer is 20 percent increase okay now the 2d part for the second office the new value will exist the reduced value then new value is 100 and the original value is 125 itself now therefore the pct subtract we demand to discover percentage decreases original value minus the new value divided by the original value multiplied by 100 so 125 minus 100 is 25 divided by 125 multiplied by 100 again you'll get the same answer as the first but it is a 20 decrease yep so it is easy merely think the formula and then yous can find out in percent increase in percentage of decrease so i promise you lot understood this if you have any doubt regarding this delight experience complimentary to comment beneath this video and do subscribe to this aqueduct for getting regular updates cheers so much for watching this video volition run across next time with a new i till then take intendance stay tuned and goodbye

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