Multiply by ten, add half again. So—- $20 × 10 = 200, add 1/2 100= $3 tip. You can figure the decimal point easily by not using it.
Larry Wright
May 25, 2017
Multiply by ten, add half again. So—- $20 × 10 = 200, add 1/2 100= $3 tip. You can figure the decimal point easily by not using it.