From the densities of the lines in the mass spectrum of krypton gas, the following observations were made:

• Somewhat more than 50% of the atoms were krypton-84.

• The numbers of krypton-82 and krypton-83 atoms were essentially equal.

• The number of krypton-86 atoms was 1.50 times as great as the number of krypton-82 atoms.

• The number of krypton-80 atoms was 19.6% of the number of krypton-82 atoms.

• The number of krypton-78 atoms was 3.0% of the number of krypton-82 atoms.

The masses of the isotopes are

⁷⁸Kr, 77.9204 u    ⁸⁰Kr, 79.9164 u    ⁸²Kr, 81.9135 u    ⁸³Kr, 82.9141 u    ⁸⁴Kr, 83.9115 u     ⁸⁶Kr, 85.9106 u

The weighted-average atomic mass of Kr is 83.80. Use these data to calculate the percent isotopic abundances of the krypton isotopes.