Shannon had 90 white coins and 42 black coins. Shannon gave away 40% of her white coins and 50% of her black coins. What percentage of her coins left was black?
Percentage of white coins left
= 100% - 40%
= 60%
Number of white coins left
= 60% x 90
= 60100 x 90
= 54
Percentage of black coins left
= 100% - 50%
= 50%
Number of black coins left
= 50% x 42
=
50100 x 42
= 21
Total number of coins left
= 54 + 21
= 75
Percentage of coins left that are black
=
2175 x 100%
= 28%
Answer(s): 28%
