Type each leg in whatever the book shows — American (-110), decimal (1.91) or fractional (10/11) — and see the combined price, what the parlay returns and how often it has to win just to break even.
Your legs
1.909 decimal · 52.4% implied
1.909 decimal · 52.4% implied
2.500 decimal · 40.0% implied
How a parlay pays
Each leg is turned into a decimal price and multiplied together. A three-leg parlay of -110, -110 and +150 pays 1.91 × 1.91 × 2.50 = 9.12, so $25 returns $228. Every leg you add multiplies the price and cuts the chance of the whole slip landing — the break-even number above is the honest test of whether the price is worth it.
If a leg pushes, most books drop it and pay the parlay at the remaining legs. Remove that leg here to see what the slip is really worth.