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This is a great trick to use if you're trying to find out a percentage mentally and get stuck. For example, if you can't immediately come up with 14% of 50, it
by jihadjihad 5y ago
This is a great trick to use if you're trying to find out a percentage mentally and get stuck. For example, if you can't immediately come up with 14% of 50, it turns out that you can just do 50% of 14 and arrive at the same answer thanks to the commutative property.
- pjot 5y agoIn my head I convert percentages into simple multiplication. So 14% of 50 becomes 1.4 * 5 == 7 Or to simplify even more… 1 * 5 = 5 4 * 5 = 20 -> remove the “0” 5 + 2 = 7
- leephillips 5y agoIs that easier than half of 14?