Video Transcript
Fill in the missing value. 0.51 plus nine twentieths is equal
to blank percent.
Normally, with a question like
this, we would look to turn both numbers into either decimals or fractions. However, as we’re looking to give
our answer as a percentage, it is worth turning both of them into percentages
first. We want to convert 0.51 and nine
twentieths into percentages.
The word “percent” means out of
100. We, therefore, need to find an
equivalent fraction to nine twentieths that is over 100. 20 multiplied by five is equal to
100. As we have multiplied the
denominator by five, we need to multiply the numerator by five. Nine times five is equal to 45. As 45 over 100 is the same as 45
percent, then nine over 20 is also equal to 45 percent. To convert any decimal into a
percentage, we need to multiply by 100. 0.51 multiplied by 100 is equal to
51. Therefore, this is equal to 51
percent.
Our calculation becomes 51 percent
plus 45 percent. 51 plus 45 is equal to 96. Therefore, 0.51 plus nine
twentieths is equal to 96 percent.
