It is: 140+70 = 210
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140
The percent sign % can be defined as "divide by 100". So the decimal of 140% would be 140/100 or 1.4 So if you wanted to know what 140% of any number was you could multiply by 1.4 i.e. 140% of 50 is 50 x 1.4 = 70, or since multiplication is distributive you could also do this (140 x 50)/100 which will also give you 70 1.4
30 increased to 45 is a 50% increase.
100 increased by 50% results in 150Decreasing 150 by 50% results in 75
To find 50% of 200, you multiply 200 by 0.50, which equals 100. Adding this to the original 200 gives you a total of 300. So, 200 increased by 50% is equal to 300.