680 X 1/8 = 680/8 = 85
680*1/10 = 68
There are 30.48 centimetres in one foot. Therefore, 680 centimetres is equal to 680/30.48 = 22.31 feet.
There are 1000 metres in one kilometre. Therefore, 680 metres is equal to 680/1000 = 0.68 kilometres.
There are 10 millimetres in one centimetre. Therefore, 680 centimetres is equal to 680 x 10 = 6800 millimetres.
One foot is equal to 0.3048 metres. Therefore, 680 feet is equal to 0.3048 x 680 = 207.264 metres.
680
Chlorophyll a is also called chlorophyll 680 due to its peak absorption of light at a wavelength of 680 nm. This specific absorption wavelength corresponds to the optimal energy level needed for chlorophyll a to carry out the process of photosynthesis efficiently.
2% of 680 = 2% * 680 = 0.02 * 680 = 13.6
680
12% of 680= 12% * 680= 0.12 * 680= 81.6
24% of 680= 24% * 680= 0.24 * 680= 163.2