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Simplified Rounded 20% Tip Calculation

1:33
1:50
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At 1:33 in

How to find 10 and 20% of any number

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What happens here

After determining the simplified 10% tip (e.g., $1.80), double this amount to quickly get the estimated 20% tip. The presenter illustrates this by showing $1.80 multiplied by 2, which equals $3.60. This provides a fast and easy way to calculate a generous 20% tip without complex math.

Goal: Quickly estimate a 20% tip using the rounded 10% tip.

Tools and materials

  • Dry Erase Marker — Writing the calculations
  • Whiteboard U.S. General — Displaying the calculations
  • Simplified 10% Tip Amount N/A — The base amount for 20% tip calculation

What they say

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your decimal in and you got a dollar 80 which is 10% okay? Times that by two. All my skateboard guys up there, snowboard, ski guys, whatever. You guys all know that times two on 180 gives you $3 60 cents and that is 20%. Follow for more.

Auto-generated from the video audio.