Sizu Riatto
Fractions, Decimals and Percentages · Chapter 11

Percent Of and Tip Builder

Ten percent is the amount with the point moved one place. Build every other percentage from tens, fives and ones.

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Opens on Chapter 11’s example: Felix’s $68.40 dinner and an 18% tip.

Enter your numbers, then press Calculate.
From the book, Chapter 11. On $68.40: 10% is $6.84, 5% is $3.42, so 15% is $10.26; 20% is $13.68, and 18% is $12.31, making $80.71 in all. 7.25% tax on $240 is $17.40; 20% of $47.50 is $9.50; an 18% tip on a $6.40 coffee is $1.15.

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