Answer :
1. Take the bill and figure 10% in your head. Just move the decimal point one place to the left.
2. Figure half of the amount created in step 1. Half of 10% is another 5%.
3. Add the amounts from step 1 & 2. Together they’re 15% of the bill
2. Figure half of the amount created in step 1. Half of 10% is another 5%.
3. Add the amounts from step 1 & 2. Together they’re 15% of the bill