Here's the math, step by step:
- Tip: 20% of $142.75 is $28.55.
- Total: $142.75 + $28.55 = $171.30.
- Each share (4 ways): $171.30 ÷ 4 = $42.825, which rounds to $42.83.
So each person pays $42.83. Rounding up means the four payments add to $171.32, which is two cents over the total. If you'd rather it come out exact, two people can pay $42.83 and two pay $42.82, which sums to $171.30.
If the tip is calculated on the pre-tax amount or the bill already includes tax, the figures shift, so check the receipt before you split.