One way is to multiply the numbers ignoring the decimal point. If the first multiplicand has d1 digits after the decimal point, and the second has d2 digits after the decimal point, then their product has (d1 + d2) digits after the decimal point.
An alternative for the second stage is to estimate the answer to determine where the decimal point should go.
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1st choice of answer :by doing cross multipliying. or by making your denominator same
by multipliying 100 to the meter 1 meter = 100 centimeters
DP rule. From percent to decimal move the decimal two places to the left. 27.3%=.273
Use the dp rule decimal is on the left and percent to the right. Move the decimal two places to the left to change to a decimal. 2.64
Dr. Pepper rule. DP means decimal to percent move decimal to right to get percent. Move decimal to the left to change percent to decimal. 25.3%=.253