2 ms·
I multiply by 1.5 (+50%) and then by 1.1 (+10%). Both are easy and fast to do by head and the total (1.5*1.1=1.65) is close enough.
by ulfw 7y ago
I multiply by 1.5 (+50%) and then by 1.1 (+10%). Both are easy and fast to do by head and the total (1.5*1.1=1.65) is close enough.