In the Mexican case, the 33% decrease completely cancelled out the initial 50% increase.
Lucho Gonzalez's 16th-minute equalizer for the French side cancelled out Marco Borriello's opener six minutes earlier.
Arlidge's second penalty was cancelled out by a Nikora kick, the final action of the first half.
Long and Keiron Cunningham cancelled out tries from Salford's Simon Baldwin and Malcolm Alker in the second half.
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Fly-half Keatley opened the scoring with a penalty that was soon cancelled out by Blues opposite number Parks.
Matt O'Halloran grabbed a 90th minute winner for the Whites after Brendan McDaid's opener had been cancelled out.
But that opener was cancelled out by two quick-fire McIndoe headers before Wolves had a penalty shout waved away.
AstraZeneca has argued that the chemotherapy might somehow have cancelled out the benefits or Iressa, but Warrell is uncertain.
Fiorentina striker Adrian Mutu had earlier cancelled out Paulo Barreto's 25th minute opener.
He had earlier cancelled out a Westwood birdie on the par-five eighth which would have pulled the Englishman level.
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The Tigers trailed 17-16 at half-time, Toby Flood's early try cancelled out by tries from Danny Care and George Lowe.
The even lines would be cancelled out by the odd lines and all you'd see was green and purple mixed.
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But the foreign secretary's new enthusiasm is easily cancelled out (or, some say, explained) by the chancellor's recent lack of it.
The Serbia international kept his place for the visit of City and cancelled out Emmanuel Adebayor's penalty before David Edwards's second-half winner.
After the break, Benjamin Boyet kicked a 43rd-minute penalty for Bourgoin, which was cancelled out three minutes later by Hook's fourth penalty.
That was cancelled out by Hook's third penalty in the 38th minute.
Geovanni opened the scoring for the Tigers, but his ninth-minute effort was cancelled out by Beijing's Mobido William just after the break.
The bad weather in the UK over the pre-Christmas period, which is critical for the company, meant that earlier gains were cancelled out.
After visiting winger Richard Haughton had quickly cancelled out home prop Joe Marler's early try, full-back Mark van Gisbergen's conversion put Wasps ahead.
Benjamin Kibebe's volley opened the scoring inside two minutes, then Sean O'Connor's 28th-minute header cancelled out the lead and gave Queens some hope.
Cresswell's goal, which gave Craig Brown's side their sixth draw in eight league games, cancelled out Paul Robinson's 31st-minute opener for the Hornets.
The world number three cancelled out two of his three birdies on the front nine with dropped shots at the sixth and ninth.
Mikael Samuelsson scored the winner for the Swedes in the third period power play after Mike Modano had cancelled out Daniel Alfredsson's opener.
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Australia dominated territory and possession but it was 3-3 at the break as Scotland fly-half Phil Godman cancelled out a Matt Giteau penalty.
On certain circuits and with some drivers, the speed gain from KERS can be cancelled out by the additional weight of the system.
Deon Carstens was penalised for bringing it down, allowing Geraghty to notch his third penalty, which was instantly cancelled out by another from Hougaard.
Early converted tries by Kameli Ratuvou and Rodd Penney cancelled out Yachvili's opening kick and put the English side 14-9 up at the break.
Twelvetrees kicked Leicester into an early lead that Robinson cancelled out just five minutes later, before Leicester's fly-half restored the advantage with another penalty.
The French side trailed 12-8 at half-time, Chris Walker's two tries having been cancelled out by converted scores from Willie Talau and Ashley Gibson.
After Ryan Mullan had cancelled out Richard Clarke's first-half goal for Newry, Mark McAllister looked to have won it on 90 minutes for Dungannon.
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