How many megagrams are there in 7.020 * 10^-10 nanograms

From the basics conversions:

1 nanogram is equivalent to 1 * 10^-15 megagrams

To convert 7.02 * 10^-10 nanograms to megagrams, all you have to do is cross multiplication as follows:

1 nanogram ... > 1 * 10^-15 megagrams

7.02 * 10^-10 nanograms ... >? megagrams

megagrams = (7.02*10^-10 * 1*10^-15) / (1) = 7.02 * 10^-25 megagrams

7.020 * 10^-25

There are 15 orders of magnitude between megagrams and nanograms Megagram = 1 x 10^6 gram

Nanogram = 1 x 10^-9 gram