To divide one power of ten by another, simply subtract the two exponents (see Multiplication/Division). Next, convert the two numbers from scientific notation to real numbers. Now add the two numbers normally. Finally convert to scientific notation if the coefficient is less than 1 or greater than 10.
Precipitation occurs when cloud droplets combine and grow large enough to fall to the earth the rate of evaporation as a drop falls to the earth also can affect its size. from: sadia aisa.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around May 2, occurring in 39% of days. Precipitation is least likely around May 31, occurring in 32% of days.