Make changes per James's comments

web/lib/firebase/contracts.ts

@@ -53,7 +53,6 @@ export function compute(contract: Contract) {
   const probPercent = Math.round(prob * 100) + '%'
   const startProb =
     startPool.YES ** 2 / (startPool.YES ** 2 + startPool.NO ** 2)
-  const startProbPercent = Math.round(startProb * 100) + '%'
   const createdDate = dayjs(createdTime).format('MMM D')
   const resolvedDate = isResolved
     ? dayjs(resolutionTime).format('MMM D')

web/pages/make-predictions.tsx

@@ -149,6 +149,10 @@ ${TEST_VALUE}
           <div className="form-control">
             <label className="label">
               <span className="label-text">Prediction</span>
+              <div className="text-sm text-gray-500 ml-1">
+                One prediction per line, each formatted like "The sun will rise
+                tomorrow: 99%"
+              </div>
             </label>
 
             <textarea