Mary had 70 grey coins and 40 brown coins. Mary gave away 40% of her grey coins and 55% of her brown coins. What percentage of her coins left was brown?
Percentage of grey coins left
= 100% - 40%
= 60%
Number of grey coins left
= 60% x 70
= 60100 x 70
= 42
Percentage of brown coins left
= 100% - 55%
= 45%
Number of brown coins left
= 45% x 40
=
45100 x 40
= 18
Total number of coins left
= 42 + 18
= 60
Percentage of coins left that are brown
=
1860 x 100%
= 30%
Answer(s): 30%
