Rounded to the nearest whole number 5.5 is 6
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1, 5, 11 and 55
The tenth triangular number is equal to (10 x 11) / 2 = 55.
Sure. 55% of something is equal to multiplying the "something" number by 55/100, which is 0.55 in decimal equivalent.
It is: 55/5 = 11
To find 42 percent of a number, multiply the number by 0.42. In this instance, 0.42 x 55 = 23.1. Therefore, 42 percent of 55 is equal to 23.1.