The product is 690
If you want to round 690 to hundreds the answer is 700 but with tens then 690 still
Two thirds of 690 is calculated by multiplying 690 by ( \frac{2}{3} ). This equals ( 690 \times \frac{2}{3} = 460 ). Therefore, two thirds of 690 is 460.
158.7 is 23% of 690.
0.0087
If the question is "What measures of distance are used with (visible) light?" Light is normally measured either in Angstroms, which are ten-billionths of a meter, or, more commonly today, in nanometers, which are one-billionths of a meter. Red light is around 700-690 nanometers (some claim all the way to 760 nm) and the wavelengths get shorter as the colors get "cooler" (that's psychologically cooler; they are actually getting more energetic). Around 400-390 nm they slip into the ultraviolet and we can no longer see them.
85 percent of 690 = 586.5 85% of 690 = 85% * 690 = 85%/100% * 690 = 0.85 * 690 = 586.5
The product is 690
690
690
87-690 = -603
If you want to round 690 to hundreds the answer is 700 but with tens then 690 still
23 x 30 = 690
nec 690
690
690
158.7 is 23% of 690.